I like everything.
Guns N Roses, Led Zeppelin, Goo Goo Dolls, My Chemical Romance, Andrew McMahon/Jack's Mannequin, The Used, Smashing Pumpkins, Elton John, McFly, Marylin Manson does the best covers EVER, Evanescence, The Verve, Rihanna, The Darkness, Rod Stewart, Meat Loaf..... the list goes on.
I love all heavy/alternative rock music (and adore stadium rock, Van Halen, Whitesnake etc)
Most indie, some pop, some metal, most alternative, some emo, some classical etc.