Okay I’ll jump in on this one. A day late, and I already don’t know if I’ll survive all entries.
This has been my worst kdrama year ever since I started watching a couple of years ago, with 2022 dramas watched less than double digits, and not all were 16eps even. I trudged through most. Not a single 10/10 drama, although a couple came close. The only entrant in my 10/10 list came from elsewhere (a jdrama, DOUBLE, in case anyone wants to know):

Bloody Heart – the one I enjoyed from start to finish
Fanletter, Please – so boring
Love All Play – started out fun, but they ran out of story
May It Please the Court – solid leads, loved the banter, but story was all over the place
My Liberation Notes – what a waste of a wonderful cast, title and premise
Sh**ting Stars – fun fluff, KDY has comic skills
Through the Darkness – the Hair. the drama could have been better,
Twenty-Five Twenty-One – the one I enjoyed from start to three-quarters in.

For the record, my MDL records report that I tried 22 other kdramas and dropped all of them. The one drama I’m still watching is Cheer Up, but it’s lost its early charm, so it may well be the 23rd on that list.

2022 was a bad year not just for dramas but for life in general. I hope 2023 is completely the opposite.