Dog that bit me for no reason that I could see? A miniature schnauzer.
My brother's wife has one of these. "Oscar" is 10 years old and has bitten every single family member and drawn blood on many occasions.
"That's just the way he is. I guess he's spoiled" is what she says.
My brother had a Husky/GSD mix for 15 years. This dog was 70lbs, and would BITE KIDS for absolutely no reason, and would lunge at strangers when on leash.
I wonder what people's reaction would be if my pit bull did things like this?