ok....
FFX villains suck...

Kuja...He was pretty mean and evil....but hes a man with a thong come on...

FFVIII...Sucky Villains...

FFVII...Sephiroth...KICKED ASS...He was evil...mean...and played with your mind...

Kefka...Fuckin Lunitic...Poisened a towns water just to see what would happen...

So my Favorites are...Sephiroth and Kefka