The most evil/fascinating/shocking evil mother-in-law character I have ever seen is played by Lee Hwi Hyang in My Love By My Side. I literally kept watching this drama just to see what new horror she would perpetuate on our unsuspecting heroine. She kept me glued to the screen for the full 50 episodes just to see her comeuppance.
Hi, just read your review of Why Why Love. Another drama Mike made good with his killer smile is Bullfighting. And he even manages to pull of a more mature character in Sunny Happiness...all the other stuff of his I have seen are not so good :( But you should try those two if you've become a Mike He fan :)
http://mydramalist.com/japanese-drama/2663/don-quixote
http://mydramalist.com/japanese-drama/115/love-shuffle
http://mydramalist.com/japanese-drama/32/nodame-cantabile
http://mydramalist.com/japanese-drama/5494/piece
http://mydramalist.com/japanese-drama/4412/rich-man-poor-woman
http://mydramalist.com/japanese-drama/3166/risou-no-musuko
http://mydramalist.com/japanese-drama/173/sapuri
http://mydramalist.com/japanese-drama/56/tatta-hitotsu-no-koi
http://mydramalist.com/japanese-drama/28/tokyo-dogs-
http://mydramalist.com/japanese-drama/52/tumbling
http://mydramalist.com/japanese-drama/439/zeni-geba
these are diverse but all good