Metal music

I like to listen to a wide variety of music, including sometimes a healthy craving for metal. My cravings for metal come and go. I have such a craving at the moment. Some of the albums that I'm devouring are:

• Amon Amarth' album Surtur Rising
• Trivium's album Shogun
• In Flames' album Come Clarity
• Killswitch Engage's album Alive Or Just Breathing
• Metallica's album ...And Justice For All
• Machine Heads's album Through The Ashes Of Empires
• Mastodon's album Crack The Skye
• Atreyu's album A Death-Grip On Yesterday
• Avenged Sevenfold's album Nightmare
• Bring Me The Horizon's album There Is A Hell Believe Me I've Seen It. There Is A Heaven Let's Keep It A Secret
• Children Of Bodon's album Blooddrunk
• Lamb Of God's album Ashes Of The Wake
• Five Finger Death Punch's album War Is The Answer
• Hatebreed's album The Rise Of Brutality
• DevilDriver's album Pray For Villains
• Cradle Of Filth's album Godspeed On The Devil's Thunder
• Bleeding Through's album Declaration
• Arch Enemy's album Doomsday Machine
• Chimaira's album The Impossibility Of Reason
• The Defiled's album Grave Times
• Korn's album Korn III: Remember Who You Are
• Megadeth's album Endgame
• Opeth's album Watershed
• Pantera's album Far Beyond Driven
• Slayer's album World Painted Blood 
• Slipknot's album All Hope Is Gone
• Still Remain's album The Serpent
• System Of A Down's album Mezmerise
• Wolf's album The Black Flame
• Walls Of Jericho's album The American Dream

There seem to be lots of sub-genres of metal, too many for me to attempt to spell out. Wikipedia (or Encyclopaedia Metallum) might be a good guide if you want to know more, I've just tried here to pull out the harder material I like. I have left out many bands whose music I like but who I feel are a lot softer than the lot above - that's not to say the bands above only put out hard and fast material, a lot of it is melodic and there are quieter moments in some of the albums above. I hate classifying metal into sub-genres anyway. My simple mind can't take it.