I listen to classic rock, pop/top 40, country, and oldies. I usually flip between several stations when I'm driving, especially when the DJ's start talking for awhile. I have the radio on to listen to music not talk.
At home I use my cd player a lot since I own about 400 cds. I'll put a mix of them in my 6 disc magazines for my Pioneer and when I get tired of listening to them I'll change the cds or swap in a different magazine.