I've had a Pit Bull before and yes he was very loving for at least 5 years but suddenly he snapped and decided to attack me when I went to feed him.
I had to use my gun and sadly shoot him before he got through the fence and either attacked me and killed me or attacked someone else and potentially killed them.
Even though most Pit Bulls are pretty loving at least for a little while they can sometimes suddenly snap and be aggressive for no apparent reason.
So in my opinion Pit Bulls are aggressive and dangerous dogs no matter how good you treat the dog.