I’m really just curious what your most re-watched comfort dramas are and why! (No specific reason is okay, too, no pressure).
For me, it’s always been “Cherry Magic” (Japan) because I think I relate to Aoki’s self-esteem issues, and I hope that my routine, mundane life will also someday find some magic and love.
Second place would have to go to “Mr. Unlucky Has No Choice But to Kiss.” It’s just pure silliness and comforting characters with pretty much zero stress and drama.
Falling Into Your Smile. A great feelgood series. There really is nothing bad to say about this show. The main couple had great chemistry, their team is fantastic, even the other teams are a great. The story has a great pace, there is love, humour, envy, trouble, yet no real trauma like in some other show that leave you behind all traumatised and heartbroken.
I am about 1/3 of the way through Falling Into Your Smile! I need to find time to finish it, because I remember really enjoying it. 
For me, it’s a Korean drama titled “The Greatest Love”, i find it hilarious and weird sometimes, i’m also a fan of the main leads.
My most watched would be “What is wrong with secretary Kim”. I can never get tired of that drama.
I also like “Something in the rain”
Probably
My Lovely Kim Sam Soon
Faith
…
I love both of those, especially Secretary Kim. 
Oh nice! I hadn’t heard of “My Lovely Kim Sam Soon.” From 2005 right? Older dramas, or ones that I started out watching when I first got into K-drama, are always comforting to me, just for the nostalgia of it. ^^
Falling Into Your Smile is one of my comfort dramas, too. I have several actually. Most of my comfort dramas are fairly lighthearted in nature, such as 1% of Something, Thirty but Seventeen, and Dali and Cocky Prince. But I have some that are slightly heavier such as Just Between Lovers and Tomorrow, and Midnight Studio is one I only recently watched but I feel will probably enter my collection of comfort dramas.
How could I forget my favorite, was without dramas for a long time.