I try to avoid listening to the radio when I can (I hate ads - I listen to the radio for music), but when I do, it's generally one of four local rock stations (mostly one with newer music, "The Edge").

When I'm driving a car with a working cassette player (which means I can connect the radio to anything with a headphone jack), I'll generally alternate between my cds, and my mp3 player, but what I actually listen too depends on my mood, and what it's like outside. Pink Floyd's "Dark Side of the Moon" is just about perfect for driving at night, Queens of the Stone Age or Fu Manchu (among several bands) are perfect for a little bit of, uhh, "spirited" driving, and I gotta make sure I break out the Beach Boys, while summer's still here.