Still a 90s boy at heart:
Tool/APC (Diff bands, moderately diff style, but, really, same thing) - Best album: Aenima. Moderately more staying power than Undertow.
Soundgarden - Best album: Superunknown. Every track is golden except for Spoonman, and that's the one that gets radio-play?!? wtf...
Pantera - Best album: Far Beyond Driven. Most people like VDP better, but this one had everything, culminating in an awesome Sabbath cover of Planet Caravan
Alice In Chains - Best album: A CD only released in Europe, I think. Better than Dirt. Had a song called Heaven and Hell that was amazing, along with a duet between llayne and the chick from heart??!?
STP - Best album: Core. Only issue was too much radio play.
"New" music I like:
Coheed and Cambria