I've got two cars, one a Mini Cooper S and the other a Honda CRX Del Sol.
In the Mini (city driving) I keep mostly jazz and smooth dnb (Progression Sessions, etc) to keep me from getting angry. In the Honda (weekend driving), I listen to hiphop and jump-up/ragga with the roof off. I wouldn't drive around pumping The Game from the Mini because I'd look like a gay idiot, not just gay.
I used to have a Renault Megane, in that car I'd play the chavviest shit imaginable because it was a chav-mobile. I had an okay sound system in it but it was also a bit Sussex. I'm seriously thinking of buying a high-end sound system for the Mini or Honda, 0 distortion, audiophile quality but I think dnb would sound crap over it.
The fastest I'd ever driven for a longer period was in a Mercedes C350 (AMGed) and that was listening to early Pendulum - rain, night, everybody else in the car asleep, around 240 kph. Scary.
My fiancee once beat her record driving non-stop 200 kph for three hours (try not going below 200 kph) to the sounds of the Ez Rollers...