In our area the majority of pit bulls are more likely to jump on you and try and lick you to death than they are to snap at you! I didn't have any experience with them before I started working at the vet clinic so didn't know quite what to expect, and then to my surprise they've become one of my favorite types of dog. 🙂 Even after someone abandoned a pit on our property that tried to attack me they're still one of my favs, because the mean ones are so rare. Normally they are very friendly towards people in our area (Portland, OR), and the ones that aren't let you know it so there are no surprises.
There isn't a breed I'm afraid of. There are breeds I don't trust to do procedures on and will usually muzzle once I have to start poking them (Shar-Peis, Chows, Rotties, lots of Chihuahuas, lots of cattle dogs) but even those can often be quite friendly until you have to do stuff to them, and I'm not afraid of them, just on my guard. I did get bit in the ear by a Rottie when holding for a vaccine because he was sooooooo friendly to everyone that we didn't think he needed a muzzle. After that little trip to the urgent care clinic I go ahead and put a muzzle on Rotties once we have to do procedures. And most of the dogs that are truly dangerous and require sedation -- that we see here, anyway -- are Rotties. But I still think with the right people that Rottweilers can be excellent pets, just probably not with me, haha.
(In two interviews -- one in an essay, one with my interviewers -- I brought up how much I loathe breed bans, can you tell? haha.)
KingTut, have you worked with pit bulls much? They get such a bad rap I'm not surprised you're leery. But a properly bred pit bull, while it often is dog-aggressive, should always, always be affectionate towards people, it's one of the hallmarks of the breed. After you meet some of the kind that are trying to crawl in your lap and demanding that you scratch their ears or let them lick you, I'm pretty sure you won't be so concerned about them anymore. They may never be your favorites but working with some non-backyard-bred, raised-in-a-loving-home ones will help dispel that fear. Also, that whole thing about their jaws being supernaturally strong and locking in place and never being able to open again? Total myth. They're tenacious, yes, but not supercanine. 😉