@ZZoMBiE13: I don't know. I thought it had a pretty good selection of indie, punk and classic rock that meshed well with setting, especially if they were original songs for the game, with some funny DJs to go with them. Can't really rank all the other genres though since I'm mostly a rock guy but I still enjoyed them. The talk radio still had alot of laughs to offer as well (I couldn't stop laughing all through Chakra Attack). And you can't forget the commercials either.
Granted was my first GTA, but just going by this I'd still say it had some good music content.