Who is your favourite Toy Story character?

Sid. There's nothing really wrong with him from a human perspective, as far as I can remember, he just plays with toys differently. He's even very creative and makes new toys from combinations of others. But because of how he plays with toys he's evil in a world where toys are conscious. He's also the only human in the franchise that the toys ever reveal themselves to as far as I recall.

Edit: My wife reminded me Sid is a bully to his sister and breaks things in public.

Not so much as a character, but I liked the whole vibe of The Aliens. Also the little green plastic soldiers, that stuff was a riot!