I generally don't love remakes because you can't really recreate the charm of the era or how excellent certain performances were. But if I had to choose, I'll go with Stars Falling from the Sky/ Wish Upon a Star.

If you tweak (or honestly completely remove) the SFL and the stepmom/aunt(?) character, this would be such a good story. Cohabitation hijinks, cute kids, a viable love triangle, actual character growth!

Full House? I didn't like the Korean version but I really liked the Thai remake, so I think it's a story that could work with better actors and writing.

I like the idea of a modern Korean royal family with a rags to riches element. The Matchmakers has provided some ideas about how a modern day sageuk could work so I have been eagerly awaiting the remake of Princess hours. I am confident they would get rid of the many problematic elements that did not age well. I was able to look past them when watching it for the first time a couple of years ago.

Delightful Girl Chun-hyang’
I miss Han Chae-young unnie.

CITY HUNTER. It was pretty sleek for it's time, but it would benefit a lot from a remake -- updated hair, fashion, gadgets, action choreography, camera work. I don't remember everything, but I think the story would generally hold up well to today's standard so there's not a lot of rework needed in that aspect.

Damo.
I watched it and I think the image quality dulled my enjoyment of the fight scenes.

And whenever and whatever they remake them, I'd like that they light up the dark scenes. Jumong shot it's dark scenes with enough lighting so I could see what was happening. Most dramas takes the darkness of the night way too seriously.

Remake A Man Called God.
Tweak: Give Jin Bo-bae enough characterization.
And don't do Vivian Castle dirty. She didn't have to die like that.

Remake Blade and Flower.
Tweak: Rewrite the ending.

OK, with the full admission that I've never seen the original because everyone says DON'T DO IT...but also with that being the very reason I mention this: The Heirs/Inheritors/Spoiled Rich Kids.

I quite like stories of petty rich people from time to time, done up not quite as full makjang, but more like a more tightly-packed weekender. Let's do some rags-to-riches with a sprinkling of twins separated at birth type stuff!

I have casting ideas....and like the original Heirs seems to have done, it could launch the careers of a lot of young actors if there were stars like Kim Jae-won already there to draw audience, and we could get some real scenery-chewing roles for more established actors like, say, Ha Do-kwan or Jung Young-joo. Yay.

You are beautiful
I would keep the same premise but make the male lead more nunaced and less arrogant or annoying. I would remove the aunt and tone down the celebrity mother and the wicked SFL. Unfortunately, the three boys falling for our dear ko mi-nyo is significant to the plot so I will keep it.
Secret Garden
I will remove the chaebol mother as she is on my top list on worst mothers and it doesn't help that the actor got cast in that role in 3 dramas. Instead of 20 episodes, 16 is enough and I might as will remove the father's accident and the amnesia trope.

Queen In-Hyun's Man (2012) has actually held up quite well and people are still watching and loving it today. That's because the basic premise is surprisingly still fresh and the story overall is terrific. Plus, the chemistry was fire. BUT it could be even better with some modernization in characterizations. The fact that it has not been ripped off already is kind of amazing.

Ruler of Your Own World (2002)
It had a lot going on. Ex-con tries to go straight after he sees what harm his thieving has done. Lots of material . I like the original as it is, I’m afraid a new one might get gooned up. 😂
It might benefit from a new modern look, but leave the story alone ! 😂

Goong, definitely Goong. But with better written second leads. And better clothes for the FL 😅

Well, I am not into faithful remake. I need a twist, retelling. Obviously problematic element must not be there.
How about gender bent modern Secret Garden? I would love to see the female lead pulling off those hand-made Italian sparkly suite.
Boys over flower and heirs should never get remakes

Nothing really - I hate remakes with passion if I like the drama enough, I can easily overlook outdated fashion and cinematography, that's not a problem at all. I'd love subs/availability revamp for many older shows tho... and probably recast some sageuk "young" heroes with a more age appropriate actors, at least for that part of the story where they're supposed to be literal teens.

I would wish MBC/KBS/SBS to remake epic historical drama series "Toji or Land". It is such a beautiful epic story, and the historical value is priceless. The people in the story represent Korea from an undeveloped to a developed country and one of the superpower countries. In the book, Kim Hwan, the "stepbrother" of noble Choi Chi Soo, is very attractive and tall, the new cast should be physically attractive and fit. Also, character Bong Soon, the pansori singer, must be one of the leading characters since she suffers so much from childhood to adulthood as Choi Seo Hee's playmate and later Lee Sang Hyun's live-in companion. I would have these four characters as the main cast, Choi Seo Hee, Kim Gil Sang, Lee Sang Hyun and Bong Soon. They make "Toji/Land" so interesting. Thank you for reading my proposal.

How about MiSa remake with a happy ending? These characters deserve a break...

The 2009 Weekender SMILE YOU would be a good one, although it would be hard to replace the chemistry of all of the characters. The only really great successful re-make of a Kdrama that I have seen is ONE PERCENT OF SOMETHING which was the re-make of ONE PERCENT OF ANYTHING.

I'm going to say Vampire Prosecutor just because I want to see more vampire prosecutor.

How about Boys over Flowers ... but without tsundere?
I haven't seen it because I don't think I would be charmed by the ML(s), but how would it work if they were not terrible, sexist and violent boys?

Sandglass (1995)
This would benefit from the technology upgrade.

Leave my sageuks alone. Even the crappy, outdated, and over-rated ones. They are all sentimental to me. 😂
Like @miso2019 said, "you can't really recreate the charm of the era or how excellent certain performances were."

I think the only kdrama where the production quality actively got in the way of my ability to engage with the show was Sandglass, as some scenes were so dark and grainy it was literally hard to make out what was happening. Given the caliber of the production team on that one, I might settle for a really cleaned up print of the show over an actual remake though (assuming that's even possible with old video footage - not sure if it was the norm to shoot TV shows on film stock in Korea during the 90's).

I was going to list shows that had known sexual offenders in the cast, but I just did a search and it's a much longer list than I thought.

Last Scandal. Loved it, but it is definitely outdated in style

My kdrama tickle bone is telling me as soon as SUCH remake will happen, it will be a deluge of remakes, and — ok I’m not a proverbial k-shaman but — you’ll see, it’ll happen in our lifetime!

My Lovely Kim Sam Soon is just PRIME for a modern re-make. She was like chubby 30, and as far as I know all the chubby 30 years old around me didn’t even have a situationship in their lifetimes, let alone worry about being “late” with all the matrimony stuff on modern market. Plus all the chubby young people that I know are very pretty and they know it and they flaunt it and they don’t worry about this.

Make Sam Soon like 40 or 50, give her a man 10-20 years younger and explore all the “controversial” (“problematic”?) issues around it, and damn I’ll watch it, hot mama!

we already have remake from old drama and it was positively accepted, 1% of Anything. Originally acted by Kang Dong Won and Kim Jung Hwa, the remake by Jeon So Min and Ha Seok Jin. The remake definitely changed the negative aspect of the original and make it 2x times better.

right now, i wish they could remake Worlds Within or Autumn in My Heart. Double the pain, everyone?! :0

"Princess Hours." I remember reading a long time ago that a re-boot was planned, but I guess it was abandoned. This is a shame because with some modern tweaks, a tighter script, and charming leads, this drama's core story could still resonate.

Id love a remake of My Girl. I like your tweaks above. I actually like rewatching parts of this drama at times - it’s a “skimmer” for me, as I love baby Lee Joongki, some of the scamming parts and Lee Dong Wooks gullibility.
A lot of the dramas around this period could get a modern remake by eliminating the clingy annoying SFL/possessive SML and the overprotective, grabby, sexist men in general!

I wouldn’t like seeing any classic Sageuks that I’ve watched remade. They are unique really.

I often watch dramas and think — this would be better with a different actor, a different vibe, actors who can act, or a couple who actually have chemistry! So I’m all for remaking these super fun old ones with tweets!

Beautiful Days with Lee Byung Hun and Choi Ji Woo. Its the first kdrama that I watched from what I remember. It does need some updating but the story is still good. A poor orphan who strives to work so can take her sister home with her. There was a misunderstanding and she lost her. She meets a music store executive eho has a chip on his shoulder and his musical producer brothe both of course like our FL and she got stuck in a love triangle. For me, the original intent of the story was better. It got changed midway due to fans's opinion.
What I would change from it is to give the FL her own agency. She is too timid and have no aspirations in her life except to find her sister. She got along better with the younger brother but is attracted to the tsundere older brother. Throughout the show she got lead around and grabbed by the wrist by the brothers which annoyed me so much. If this gets a remake, I would love for her to have her own dream. And also for the two brothers ro be worthy enough to have her in their lives.

Welcome back @Mary!!

I recently bumped into a My Girl clip that ended up a sporadic rewatch with as much laughter as the first time. It still delights…

But I wouldn’t mind a re-make if we have a writer who can be as witty as the original one. Actually, I’d warn Lee Dong Wook to repeat as the ML with now better acting skills and more mature charm. Back then, I found him dull and Lee Jun-ki’s character annoying while LDH winning all the way on the other hand.

As entitled, the girl to play My Girl will be the key.

My suggestion: remake or reboot of tvN’s JOSEON X-FILES/SECRET INVESTIGATION RECORD (2010). I watched it in 2017 and it was my first Kim Ji-hoon drama where he played the Korean Mulder. It was set during the reign of King Gwanghae (1608-1623).
KJH was great. I would bring the whole cast back (those still with us). I would even reuse the same scripts. The No. 1 change is that I would record the drama on film not videotape because that is what it looked like I was watching. I am sure it wasn’t shot on videotape (that probably had gone the way of the dodo bird years before) but it was so dark and annoying to watch.

1. Sweet 18 (2004). I would really like to watch a contemporary drama in which a woman, almost 20, marries a man 10 years her senior, a lawyer. I wonder what scenario could be written about such a relationship nowadays. After all, there are women who get married early and are not at all unhappy about it. Not all women think about getting married until they turn 30, or they don't want marriage at all. In my opinion, it would be a challenge to mix a romantic comedy with a theme from 2004. But I would really like to see something like that.
2. I would like to finally see a new version of Que Sera, Sera (2007), which has been talked about for years, but there is no concrete news. A story about toxic people in love, far from ideal, selfish, making mistakes, and experiencing many changes in their lives. Something like that I would like to watch.

Apart from a Full House update I would also want a Full House Take 2 remake, preferably with Lee Jae-wook and Go Youn-jung.

My Princess would make a good remake. It started well but it went downhill after she came a princess. With better writing, it will make a very interesting story.

Same goes with Personal Taste</b.

IMO the actual drama execution was a garbage fire, but I think The Color of Woman had an interesting setup and could have been really good had they not made certain choices. Soo, that one's got my vote.