Genres?
Just after rock/metal stuff? How about Strapping Young Lad, Atari Teenage Riot, Slayer?

Edit: Just read the last bit. Sadly Spotify doesn't have much/anything in the range of industrial hardcore stuff, but that always gets my pulse going. Stuff like Endymion, Armageddon Project, Tieum, Moleculez.
( Labia Majora You keep on talking but it makes no sense at all, Mon 15 Jun 2009, 11:55, 2 replies, latest was 16 years ago)

Oooh
Slayer is a good choice.

If you're after an entire album of good songs, The Distillers Coral Fang is pretty nifty, if you're into that sort of thing!?
(Flim-Flam the Magnificent "You is talking loco and I like it!", Mon 15 Jun 2009, 11:57, Reply)

Cave-In
are pretty cool too. Try Perfect Pitch Black or Antenna, they're good albums.
(Flim-Flam the Magnificent "You is talking loco and I like it!", Mon 15 Jun 2009, 12:08, Reply)

Nicely done!
Cave In are great!
( Cawl, Mon 15 Jun 2009, 12:20, Reply)

I love them.
They opened for the Foos a few years ago and got booed off the stage. I really liked them and sent the lead singer an email saying I wasn't one of the booers and I really liked their music and he sent me the Tides of Tomorrow EP in the post. :)

I got really into them after they released Antenna.
(Flim-Flam the Magnificent "You is talking loco and I like it!", Mon 15 Jun 2009, 12:25, Reply)

Awh, that's awesome!
I saw them... I don't remember when or where, but they opened with Stained Silver, and it was amazing!
( Cawl, Mon 15 Jun 2009, 12:36, Reply)

Thats a wicked song...
and the opening track on the Antenna album. I really rate them because each time they release a new album they change their sound completely so you never know what to expect from them. That’s the same reason I rate Saves the Day, completely different sound but they also aren't afraid to try something new. :)
(Flim-Flam the Magnificent "You is talking loco and I like it!", Mon 15 Jun 2009, 12:43, Reply)

Not too fussed about genre
My tastes are broad enough that I wont say no to anything so long as it's fast enough :)

There's no strapping young lad on spotify, Atari teenage riot seem to mostly be too slow.

Hadn't thought of slayer, trying out pantera at the moment which isn't too bad so I'll listen to some slayer after that.
( Captain V, Mon 15 Jun 2009, 12:01, Reply)