The only genre I devotedly listen to is punk. Classic punk, horror rock, hardcore, even some modern punk... I've pretty much listened to, and continue to listen to, most of punks crazy little sub-genres. I think the reason that I like the genre so much is because I get a sense of energy from it. Everyone has a genre that just "revs them up." For me, it's always been punk.
The rest of the genres I listen to aren't so much genres as they are single bands. I like a LOT of different bands, but I haven't delved into many genres. Some of my favorite random bands are Gorillaz, The White Stripes, Jethro Tull, System of a Down, Rammstein, Melt Banana, Bob Marley, a few random ska bands, and a few random J-Rock/Pop bands, like Shonen Knife and Puffy AmiYumi.
I also really like Akira Yamaoka (the guy that does music for the Silent Hill games).
Lastly, I really like celtic/Irish folk songs, especially those done by the Brobdingnagian Bards. Oh, and classical, especially Beethoven and Bach.
