I'm a huge fan of....
Metalica
Offspring
Nirvana
Linken Park(however u spell it)
Nine Inch Nails
Nickel Back....an so on.....
To me....Hip Hop is my alternative....
Hip Hop to me seems like....I hate you, you hate me. Lets rap about it.
Rock has more reason behind it.

(and yes, there are a few artists in hip hop that are the exeptions)
But it's mainly...
Bling Bling
Tity's Ass Pussy
Rollin on Dubs
Or pushin lead into another emcee...