I've never met one. Vicious little things. Too bad for pit bulls chihuahuas aren't 90-lb dogs because then everyone's attention would rightly be focused on chihuahuas and not pit bulls.
I've never met a pit bull or a german shepherd or a doberman pinscher or even a rottie that didn't warm up to me in a matter of minutes, a few hours at the most. OTOH, I've never met a chihuahua that warmed up to me even after I spent all day trying to befriend them. Vicious little critters, which I attribute to their naturally fearful nature (but I suppose I'd be fearful around big lumbering beasts too, if I only weighed ounces).
I much prefer big dogs over the small yappy ones. I’ve been chased by the small ones, but, like you, I’ve never had a problem with the big breeds.
Yep....the pibbles and such I’ve known were in danger of thumping you to death with a frantically wagging tail, but the chis wanted blood in the worst way. Except one, and she was an intact female we picked up as a stray, estimated age 15. She was sweet and gentle.