Before pitbulls were demonized in the media they were at 1 time the most commonly found working dog in America, They are extremely loyal IMO more so than any other breed, have been breed to not be human aggressive (if they bit a handler they would be put down), are great w/ kids, and protective. I have 2 a male 7 and female 4 had the boy since 9 weeks old and could not ask for a better dog comes when I call even while chasing a deer and is a 75lb clown. the girl was rescued at 2 years of age and is great but wasn't trained she's alot better listening to commands now but nowhere near as good as my boy. I would get a puppy if we were to ever rescue a dog again. in general they all have short hair that like every other breed still sheds though not as bad, they tend to be muscle bound clowns, and need lots of exercise. there a a number of places to rescue them so not that money is an issue but a great dog for practicaly free does not hurt. police and millitary have used them for everything from search and rescue to bomb/drug sniffing dogs with great results. I can not say enough great things about theese dogs. a few fun facts an APBT (american pit bull terrier) won the national frisbee catch championship, were the on american pride posters during WW2, Petey the dog on little rascals tv show was an APBT, APBT's can pull more weight than any other dog pound for pound, are constantly obedience training champions, and as you can proabably tell by now my favorite breed!
Best of luck with whatever dog you get just remember you get out of them what you put into them kinda of like kids (ha,ha!)
BlairDoc