Can't believe I missed this topic before... better late than never, I suppose.
Anyways, my favourite genre of music is rock; bands like AC/DC, Kiss, and Aerosmith are usually what I listen to. I don't branch out much further than various kinds of rock, but here are my other favourites.
Alternative Rock (ie, Red Hot Chili Peppers)
Blues (ie, ZZ Top)
Grunge (ie, Nirvana)
Metal (ie, Metallica)
Pop/Rock (ie, The Beatles)
Punk Rock (ie, Green Day)