I like quite a bit of different types of music (except for pop, give or take a few classic rock bands I'd consider to be "op", ranging from drone to hip-hop, but my favorite genre would have to be black metal. My favorite band is Wolves in the Throne Room, a black metal band from Washington state.
I don;t like anything too hard or well... modern. So classic rock is great, easy to listen to and makes sense. Strange concept being able to understand the lyrics to a song.
Melodic Death Metal: Amon Amarth,In Flames,Dark Tranquillity,Wintersun,At The Gates and many more. Prog Metal: Opeth,Cynic,Dream Theater,Evergrey and others.