Id say just like any dog as an individual.....some are good some arent.
By good buddy had one that was great. And the American Pit Bull Terrier is one breed, that has color variations. I see people refer to 'red nose' and 'american' as though they are two seperate entities and they are not. The red nose is simply a color variation within the breed. Not busting anyones chops here but I see that mistake made alot. Same with the term 'blue,' its just a color. Though often with the blue dogs, that color is more prominent in the American Staffordshire Terrier and American Bully breeds. Often mistaken for an American Pit Bull Terrier.
Im with u its up to the dog for the most part but i do think its funny when u go to criagslist people post mixed pits with mommy being a red nose and daddy being a blue pit or blue nose to me its just a red flag saying these dogs not breed for a purpose just and just to make a quick buck. Im sure thats why pits get a bad name for human aggresion its bad breeding. I know papers mean crap when it all said and done cause ever dog is defferent but it helps to know what they are breed for eather catching ,show or other activities. All dogs need a job even if its a lap dog.