If you don't like any antagonists, then this question is not for you. Just kidding, but there has to be at least one you like.
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Ulquiorra and Grimmjow from Bleach... And Aizen to an extent... Mad genius that he is (obviously not as much as Urahara, but we are talking about the villains)
Uchiha Madara from Naruto...
I also like the Joker. Somehow I feel that he makes Batman a better super hero... By being a maniacal psycho