Thrice, The Used, Taking Back Sunday, Bigwig, etc. I listen to a wide variety of music when I am riding.. mainly harder stuff to get the adrenalin pumping. It is amazing how less fatigued I feel when I have some good music to ride to. I try to focus on the beat and keep my pedal rotations in time, when in a harder gear can really make your legs go to jelly.. I just feel more comfortable with some music playing while I am riding, it adds to the experience!
