Amon Amarth never get old to me, and i listen to them regularly...
anyway
Metallica - Too many fans of the later albums. The first 4 are OK but still not that amazing, whilst the latest 3 (And the one to be released it seems from what ive heard...) arent even worthy of fans
I have to agree with anyone who says Dragonforce are overrated, the amount of people ive heard say "Dragonforce are better" than anything i listen to is highly irritating, THEY ARENT THAT GREAT. Hell, the drum patterns is IDENTICAL for EVERY song, they admitted it themselves! How can that not get boring?!
Mastodon - Yeah, theyre OK, but they have WAY too much praise going for them. Im not saying theyre bad or anything, i like listening to them now and again, its just they really arent all that amazing.
Korn/SOAD/Breaking Benjamin/Mudvayne etc. etc. - That speaks for itself
BFMV & Trivium (And Seether) - YES, I KNOW I LISTEN TO THEM SOMETIMES. But even so, they really arent that great. Nowhere near as amazing as people make them out to be. Oh and if you flame me for listening to them, ill just ignore it. I have rights to listen to whatever i want to.
Now, when it comes to underrated bands... theres a lot more. Mourning Beloveth, Garden Of Shadows, Vesperian Sorrow...