My Ahjussi is the obvious one, but if you can find them, Mixed Up Investigation Agency (give this one a few episodes - it seems really silly and over-the-top at first but becomes something truly wonderful) and Alone in Love might also fit the bill. Also possibly Ruler of Your Own World and Beautiful World.

The three that come to mind are all older ones I have watched that had complex relationships amongst family and friends and life challenges for different generations.

The other issue is I have only seen a few of the early episodes of My Liberation notes so far so not be 100% up to speed on all the elements to do a direct comparison.

Navillera
My dear friends
On the verge of insanity

Lost/Human Disqualification, Age of Youth, and The Light in Your Eyes come to mind for me! Each has a different tone but all feel similar in pacing with slice of life, diving into the deepness of emotions of regret and missed opportunities and angst of social interaction. I would say some characters in these shows also seek liberation.

I found myself recommending a friend who loves MLN My Unfamiliar Family recently and realized how similar the shows are. I mean, they’re also entirely different, but MUF is similarly about a family of 3 siblings. They’re trying to live their own lives when a family tragedy forces them to come together again and deal with all of their issues (of which there are many). The tone is melancholy, but it never veers toooooo far into melodramatic territory, and it’s a very thoughtful show with very flawed, complex characters. Choo Ja-hyun was a revelation to me here and I’m forever a fan!

My Ajusshi would be the obvious choice since it was written by the same writer.

As for the other choices, I would recommend A Beautiful World if you don't mind school bullying theme, Misaeng for insightful workplace drama, Just Between Lovers for deep exploration on trauma and grief, and Matrimonial Chaos for some introspective and unique view about marriage and relationship.

Writer Park Hae-young’s other works - Oh Hae-young Again and My Ajusshi - are the obvious recommendations. Branching out a bit, these are ones I’d recommend:

• My Unfamiliar Family
• Human Disqualification
• Just Between Lovers
• The Light in Your Eyes

TBH, finding dramas that are kind of similar in tone or subject matter is a bit difficult. My Liberation Notes has been such a transcendent and different experience compared to most kdramas for me that even trying to find a likeness seems…wrong. I mean, I can think of almost nothing that makes me feel the way this drama makes me feel on a weekly basis. Looking forward to seeing what everyone else recommends. Maybe I’ve forgotten obvious picks or will discover an overlooked gem.

Kdrama: Be Melodramatic. Melancholy, funny, quirky, touching.

Non-kdrama: Six Feet Under. The show's family (mother and three very flawed siblings) owns a funeral business so the show explores life and death from all angles. One of the greatest TV shows of all time and truly existentialist.

I rock my brain to find something similar but I can't find one. A piece of your mind before they cut it? MLN is felt more like Korean movie to me. A Little Forest Korean version and Japanese version?

My Unfamiliar Family : For the family part.
When the Weather is Fine : For the countryside part.
A Piece of Your Mind : For the mourning part.

This exasperatingly dysfunctional site doesn’t work again. I can’t access any comments. Surely, it isn’t just me? What is going on?

My Ahjussi without second thought.

Just watch all previous works written by Park Hae-young.

Oof!!! There are Many...but the one that comes in my mind right now is DAYS!! I only finished that drama for the ever ADORABLE and TALENTED Seo in-guk. That is all!

When the Weather is Fine. It has a similar vibe but more uplifting. It's calm and thoughtful.

I would say "Live" and "Love Affairs in the Afternoon"

My Ajusshi since its from the same writer. Plus Misaeng, My Unfamiliar Family and Just Between Lovers for office drama, family drama, dealing with trauma and similar mood overall.

There were some really beautiful, tender, and heartrending moments in Wok of Love that I still remember vividly. Quirky, funny, and touching.

For me it's a no brainer: Be Melodramatic and then, the new film, The Roundup, for more Son Seok-koo. The first because it's
Quirky
Funny
Sad
Unique
and the second because SSK is playing a completely different character.