There are so many "bad guys" from アニメ that I really like there's Envy-kun,Lust-san,Sloth (2003 アニメ only) and Greed from FMA,Dark Marik and Dark Bakura from Yu-Gi-Oh..Rocket-Gang from Pokemon..specifically Yamato-san (Cassidy in the english dub) she's my お気に入り アニメ "bad guy" right now.
well it's Ulquiorra & then there's Zola. since Ulquiorra has been 投稿されました i go for my 2:nd favourite. she's awesome but i really didn't want her to be bad :( it's different with Ulquiorra. that he's bad is what makes him so cool.