On no other drama have I laughed and cried as much as here and every laugh and tear made me happy. It's not that I'm a masochist. The tears were due to the really wonderful storyline and emotional acting. Sometimes they were tears of emotion and sometimes of laughter and sometimes of I don't know what because the mood changed so fast I couldn't keep up, but I loved it.
I avoid dramas about DID and psychological problems in general because they are either too serious or too silly. "Kill me, heal me" is neither. It portrays the problem of multiple personalities in a really clever way and each of those personalities has an absolutely wonderful charm. Here, a big bow goes to Ji Sung, who rose to the acting challenge to the point where his individual personalities had their own fans. My favorite personality is Park Perry, although Ahn Yu Na provided the most laughs for me.
The problem told in "Kill Me, Heal Me" is an important and difficult one, but the creators told it in such a way that it's hard not to love the story, even though I know people who absolutely disliked the drama. For me it became one of my favorite dramas from the very first episode where the viewer got the right plot construction and the perfect balance of humor, emotion, and curiosity about what will happen next. The following episodes were only more interesting. Even the ending was beautiful.
Finally, a few words about the music. It's really excellent, although a bit exaggerated, but it perfectly reflects the character of the scenes and characters. It's one of the strongest elements creating the mood of this drama.
Is it worth watching again? Definitely YES!