I love pitties! I work as an RVT in a veterinary hospital, and I have yet to come across a pit bull that I didn't like. I have seen countless Chihuahuas and other small breeds who are just nasty, sadly. Even if I do come across an aggressive pittie (or any other breed for that matter), I definitely never blame the breed. I blame the owner. You can't group a breed as 'bad', not all of them are. It's individuals. Look at Labradors, everyone thinks they are just the friendliest breed out there. They are indeed friendly dogs, but believe it or not, I had an extremely aggressive Labrador! So, it's definitely NOT just pitties, Dobermans, Rottweilers, etc.