I've never really been a fan of metal. The only metal bands I have in my iTunes library are Dream Theater and Mastodon. The latter are my favourite of the two...I do like me some Mastodon. Despite the potential to get bashed in this thread for what I'm about to say, I'm gonna say it anyway...I've always preferred metalcore, hardcore and the heavier sides of punk to full-on metal...
When I was younger I liked Dragonforce, but I find power metal dull and needlessly masturbatory. But that's obviously just my opinion, I'm not trying to belittle anyone's tastes here.
However...if we were to list the albums that my iTunes library labels as simply "metal" then we would get these:
Alexisonfire - Crisis <<<< Definitely not metal. Post-hardcore, if anything.
Death Is My Only Friend - Death By Stereo <<<< Metalcore/hardcore and no way close to metal compared to one of their other albums, Death For Life
Deftones - White Pony <<< Nu-Metal greatness. Many don't consider them metal though...I dunno.
Dream Theater - Train Of Thought <<< Progressive Metal.
Glassjaw - Everything You Ever Wanted To Know About Silence <<<< Definitely not metal. They're screamo, with the beginnings of metalcore.
Hatebreed - Supremacy <<<< Hardcore, not metal. Although some might tenuously consider them metal? Again, I dunno.
Mastodon - Blood Mountain <<<< Yup, metal. Dunno if they'd have a sub-genre stapled onto them though.
Therapy? - Never Apologise, Never Explain <<<< More punk than metal although the band have been described as very simple metal...I would disagree though. They have metal influences but they're closer to hard rock/punk than metal.
Therapy? - Troublegum <<<< Pretty much the same applies as with the above album, although Troublegum has a much more pop-punk sound to it.
Walls of Jericho - With Devils Amongst Us All <<<< Metalcore. That is all.
36 Crazy Fists - Rest Inside the Flames <<<< Metal...although they border on metalcore at times... Maybe? lol
I don't know much about metal and having typed out the word so many time it's started to lose it's meaning to me lol. I've alos completely the point I was going to make at the end of this list. Oh well, make of it what you will.