Assuming you're more into electronic stuff, go for Nine Inch Nails (most of it is industrial pop rock), The Prodigy (great stuff), Infected Mushroom (dance/electronic?) and Groove Armada (has some good simple, catchy tracks).
A short list, though that's the only stuff in my playlist I think you might like so far. Let me know when you move on to progressive rock/metal or jazz, I should provide you with something more-or-less worth a listen then. :>
EDIT:
ok maybe I like "light" metal, like Tenacious D
Oh god.
EDIT2:
Saribous seems to have beaten me in progressive metal suggestions. Townsend's music is epic.