Favorite Male Antagonists in a Kdrama

These are my favorite bad guys in Kdramaland. Kdramaland is sadly replete with cookie cutter, 2-dimensional, all evil, all the time bad guys. But every once in a while there is one that is fascinating and awesome to watch, and who almost, for a split second, makes you care about him. The titles are below. Here are the characters: Chae Do Woo; Do Young; Safari (he's not the Big Bad in this drama, but he is the BEST bad); Lee Jin Pyo; Mao; Oh Seung Ha; 4-way tie between (and none of them is the Big Bad in their dramas) Yeo Woon & Chun, Joo Wal, Yeom Jang, Jo Moo Cheol.