I just hate the fact that all of the songs have exactly the same drum beat and lyrical content.
K-DST and Radio X are great stations for me. I grew up around the time a lot of the songs on Radio X were new, so I really enjoy it. I also spent more time travelling around with my dad's 70's/80's Rock-style band, so I listened to a lot of the stuff on K-DST. While driving around, though, I actually enjoy listening to almost everything, the exceptions being K-Rose and CSR. Everything else is good to drive around with, seeing as I tune out of everything when I'm driving on the game, and it just sounds like background music.
Vice City for me was more: Sing along to some dodgy 80's song whilst laughing my head off. GTA III's radio just plain sucked. Chatterbox was awesome, but really, I didn't like much else. K-Jah was alright, and Head Radio was only good for background music.