metalcore, screamocore, emocore, post-hardcore, where you've got the -core, i'll probably be listening to it.
I especially love the welsh bands, things like funeral for a friend, and bullet for my valentine, yourcodenameis: milo, other great non-welsh bands, i don't know, alesana, emarosa, aiden, drop dead gorgeous, devil wears prada, silverstein, ..tons more.
I'll sometimes listen to the older system of a down stuff. I'll also listen to some pop punk, (alkaline trio).
I always have some metal, and for that in that i listen to Heaven Shall Burn.