I love how everyone says "everything!" and then when i start asking them what thier favorite bands are they are in a specific genre. For me, It is quite diverse. I enjoy, singer/songwriter (matt nathanson), modern rock (matchbox 20), some classic rock(Billy Joel), alternative christian(Jeremy Camp), indie (Death Cab for Cutie), jam bands (O.A.R., Pearl Jam), and some progressive type metal (dredg).
If you want to see it all....
http://www.last.fm/user/benthos/