yeah, it's really not that pit bulls have aggressive temperaments. Plenty of breeds have really bad temperaments and are skittish and bite, like chihuahuas. If a chihuahua was as powerful as a pit bull, you'd probably see them close to the top of the list.
It's just that pit bulls are so powerful and SO determined. Once they go off they do major damage and just don't stop.
I like pit bulls, in general. Very smart and affectionate dogs.