I'm so a re-watcher! I just finished re watching K.O. One (3rd time), The X-Family (3rd time) and K.O.3 an guo (2nd time)! Which took almost all of February with school, and even though I just watched the entire series not even a year ago because the new one K.O. One Two came out it made me want to go back and revisit all those old characters again, and I loved it just as much as I did the first and second time! I'll re-watch almost anything even if it's not the best drama because I remember how I felt the first time I saw it, and I want to feel that again on some level.
I've also rewatch Boys over flowers (2), Hana Yori dango season 1 & 2 (3-4), Meteor Garden(3), Mars (4) , Hana Kimi (5), All three seasons of Gokusen (about 9 times in total), Devil Beside You (3), Faith (2), ect., ect., ect.
Lets just say that if this site kept track of re-watching dramas too my total time clocked on drama watching would be in the thousands! lol