Right now, favorite band is TETRA-FANG. They're an awesome Japanese rock band that only does songs for a TV show I watch called Kamen Rider Kiva (the actor behind the main character is the singer). They've just got an awesome sound, and I don't think I've really heard a song from them yet that I don't like.
Some of their stuff (if you don't mind not understanding lyrics
)
"Supernova"-http://www.youtube.com/watch?v=XwDxqnSuflk&feature=related
"Exterminate Time"-http://www.youtube.com/watch?v=5CxFtYdxV8k&feature=related
But my favorite song right now has to be "Devil In Jersey City" by Coheed and Cambria.