Temperament generalisations of dogs!?

A lot of dog behavior depends on how they are treated starting at birth. Puppies from a warm, loving environment, one with little kids around and not caged 24/7 tend to be friendlier and loving right off. That is not to say you cannot change a temperament. I knew one guy who wanted a mean rottweiler so he treated the dog mean. Then, when the dog was grown he couldn't understand how it was so aggressive. When certain breeds have been bred for purposes like security, of course their love reputation goes down the tubes but I have had dobies, rotts, and danes when my kids were babies and never had a problem. Like kids from a bad neighborhood--you have to love them and give them a chance.