Slipknot and Lamb of God are not metal, they are nu-metal. Metallica is metal.
Also, you included Metallica's stuffty songs.
Kill 'em All, Ride the Lightning, Master of Puppets, ...And Justice For All, and Black are the only good albums. After Black is utter stuff and even most of Black is. I only really like The Unforgiven.
-snip-
You forgot some of their best songs, nublet.
You had best shut the forget up. You're the loving noob here. I'm pretty sure you don't even know how to loving use Audacity or Goldwave to make looping clips.