i saw a lot of bands: Metallica, Slipknot, Machine Head, The Haunted, Anthrax, Slayer, Megadeth, Iron Maiden, Rage Against the Machine, Dragonforce, Devildriver, God Forbid, Serj Tankian, Suicidal Tendencies, Hatebreed, In Flames, Marilyn Manson, Motley Crue, Arch Enemy, Gojira, Cradle of Filth, Crucified Barbara, Papa Roach..... when i can i always go some festival like Electric Weekend, Sonisphere or Kobeta Sound..... =)