Pitbull hands down. Ive had great pyrenees, akita who was very dog aggressive (not saying they all are) labs that had pups twice, and my mom has a english bulldog who sure racks up the vet bill, but ive personally owned 3 pitbulls and they are by far the sweetest, most goofy, tolerant, cuddly, eager to please dogs ive ever had. The ones I have now is dallas, shes my avatar. She lets the toddlers poke her all over, pull her ears, tail and nips lol and use her as a step stool if shes in their way. Shes also the most submissive dog at the dog park, shell run from a chihuahua if she thinks its gonna attack her. They can be hard headed sometimes tho!