I've noticed that white dudes in BMWs and Benzs loooooove to fly up on you in the fast lane doing 90+ (and sometimes in the slow lane too!) I also see that on 95 north, but seems like everyone is flying on that road anyways
Also, little Asian ladies in Toyota Corollas/Camrys like to make turns at the last minute, take 3487247 minutes to make a lane change, etc. Of course (disclaimer) this isn't always true, but its happened SO MANY TIMES that I couldn't help but notice.
As for bikes, I notice that its not just specifically sportbike, Harley or jap cruiser riders that are unsafe and rude on the road, its the guys with "something to prove". Either its the 18 year old kid on a R1 in a wifebeater that thinks he's cool wearing his flipflops, or the chopper/cruiser rider with his BRAINCUP on that thinks his face and arms are impervious to the powers of skin vs asphalt
Not like I care, hell natural selection can work its mighty power, I just notice that lack of concern for one's own safety (obviously) seems to translate to lack of caring for those around them.