First i will say i gotta go with keaton on this one Mastodon has gotta be up there. Although i prefer Leviathan, Blood and thunder is awesome.

Then the rest:
Protest the hero
Abigail Williams
All that remains
Amon Marth
Buckethead-Cuckoo Clocks Of Hell
Devildriver- Clouds over California
Dethklok
Pelican
Job for A Cowboy
Yakuza

Not really metal but they get a special shout out, and they are still pretty hard:
The fall of Troy
Enter Shikari
Irepress

And rap really isnt that bad. Yeah the popular stuff on the radio usually sucks. But thats usually true with most music. There is some great rap out there that isnt really main stream. There is also some great stuff from the UK.

I like the american rap of the 80's like Public Enemy for example.That was the authentic rap.

Sounds like someone tried to copy Metailica and FAILED horribly.

You deserve a big win cake.

Older rap, in my opinion was much more creative, and had
more personal experiences in it. Some were even political,
which of course, I would love >:]

Metallica is a joke.

I hope what you're saying is a joke.

and...

YouTube - Have The Offspring Ripped Off Greenday?

Check that! >.>

I would say the whole band is a joke, but Lars... Is a bit out of place... But he is one of the founding members of Mettallica...
They sound a like, same crap has the Coldplay/Satriani problem, they sound a like doesn't mean they ripped it off. And this isn't the first time someone acuses them of ripping off another band, like the Beatles.

Nope, it's clearly about American Idiot. The Offspring seriously hates Green Day atm, and that song title is 'Rise and Fall'. Get the idea? The song times are very similar, the voice all over the song and hey, the solo is damn similar. And have you checked 'Hammerhead' bass solo. It's identical to one of Nirvana's songs. Why would I listen to songs which are quite the same as ones I've listened before?