I actually think Boston drivers are some of the best. I now live in Boston -- the roads aren't conducive to organized driving, so people ignore the rules when necessary for the sake efficiency and doing what makes sense. People honk to let people know their intention or to make themselves known when in a blind spot.
It beats the hell out of places like North Carolina, where drivers are classically bad (tailgating, no blinkers, drive way under the speed limit, stop on on-ramps, people don't know how to parallel park, etc.), but also impractical (no one will cross double yellow to go around a tractor, even with plenty of vision, because "it's against the law") and people take it personally when others honk, as if honking is only reserved solely for when you want to let someone know that you are flipping them the bird.