Guy's how can you say this about ALL pitbulls. I don't have one, in fact I had a fear of them until a friend of mines got one and they are so sweet. Pitbull use to be known for being family dogs until they got breeded for their aggresiveness. If you go through a good breeder, they will breed their dog with only other dog's of good temperment. It's because of a few bad incident's that ALL pitbulls get a bad wrap! This is so sad, if you could see them with children and how loving the majority of them are you would not believe the hype.
I also have what is considered an aggressive dog. She's an akita and is a sweetheart. Kid's love her and she loves them. My little brother and nephew were just here this past weekend and they wore her out playing. Because she is so big, I would always supervise play time. In fact I would say alot of dogs are provoked by children who don't know any better. Several times I had to tell my brother and nephew to stop jumping on her, so as not to irritate her.
For the most part with other dogs she is okay. She times she doesn't like a dog and will bark at them, but that is the minority not the majority of the time. I would say 80 percent of they time they are barking at her and she is whimpering because she wanted to play with them.