I think he's funny, and even if his fighting style really sucks, he's got a little something that makes him likeable.
I mean, he sounds really whiny at some point, and then he changes his voice a little to sound more mature, like he's trying to imitate Saix and... well, even Xigbar can sound like a sissy girl....and Xemnas' got some serious lip-sync problems, being that his lips just move too much OwO
Just look at'em... he's like uber-atriculate, he just speaks so slimy and theatrical ha sometimes sounds a bit whiny, too.