I've met very few I've personally liked, but then they aren't the type of dog I'd be looking for to own either and not everybody likes the dogs I like. But I will say people better know what kind of dog they want, and be prepared for what might lie ahead.
A big strong dog with very strong DA and shorter nerves when dealing with strangers could be a disaster with someone not ready for what could be down the road. When these things show up in smaller dogs, it's not such a big deal. In a big strong dog, it can be very bad to say the least.