Someone better link me to metal that doesn't sound like people kicking guitars. Because that hardcore crap can die, hopefully with our generation's taste in bad music.
Rap can be alright, with tasteful lyrics and some sort of creativity, like Spunky said, club music (50 cent) can go ahead and burn.
In terms of the guitar/Rock... I enjoy Queen, Rolling Stones, and the song Knights of Cydonia. Yes, like others, I've learned to like some songs through the latest installation of Guitar Hero.
Overall, I prefer Gorrilaz, and Massive Attack.