Only ever saw 3 staffies in my life and one was from a vehicle. Both of the others were mushbuckets.
A cousin of hubbies raises bull terriers. Lots of fun playing with those. Some friends of ours raise rotties that are like puppies in spite their masses (medium to large).
I have also encountered a cranky black lab. Hubby clocked an Alsatian that rushed and surprised him barking. I whacked the throat of a dobie that lunged at me, but that was likely because I was running along a beach and the owner was running towards me and thought I was an attacker. The dog coughed a few times and was ok after a while, but wouldn't come near me for a long time. (Turns out the owner and I became good friends).
My cousin nearly had his face chewed off by the family dachsund when he was a kid. It pays to be cautious when your kids are around dogs or vice versa.