Hi, I hope you are well.
I like K-Dramas. Tried C-Dramas,. Won't try J or T. What I like most is friendship, platonic bonds, bro/sismance, unconditional love/redemption/forgiveness themes and relatively serious stories, but tragedies and thrillers I watch parsimoniously. Comedy and action are all good if there's something deeper behind it. I like things that suit my subjective definition of well-written. Definitely not a sucker for romance of any kind. If it's subtly there or background I may like it. If not I mostly avoid. Other than that I can like any kind of stories, in theory. In practice, I have strange tastes. I very rarely try new dramas unless I'm feeling adventurous, mostly I rewatch and rewatch and rewatch and then search for new but similar stuff afterwards.
My top 5 in no specific order is :
My Mister
Miraculous Brothers
Navillera
Life
Good Manager
+ Special mention for Signal because it was my first ever drama and I watched it with my partner so it's unique. It's also very good.