I'd have to say... Rau le Creuset from Gundam SEED. He manipulates two other villains (Patrick Zala and Azrael) to
do all the destruction for him by having them go head to head against each other, while he sits back and watches smugly
and looking all innocent. Plus, he has an awesome-looking mask XD
Naraku's too gross-looking and cowardly XD Esp after seeing how he reconstructs himself.. ew. and that he's a
bit cliche.
Light/Raito from Death Note, I hate him as a character, but he's an excellent villain.
Not so much in animes, but in Disney cartoons, I always cheered for the villains, 'cause the heros are just so
boring and 'perfect' and 'goody-goody'. Like in Snow White, I cheered for the Wicked Stepmother
'cause I hate how happy and nice and sweet Snow White is. but of course, the villains there never win ^_^'