That M84 Guy has seen 431 bands.

Band Concerts Seen
  Powerman 5000 20 concerts
  Killswitch Engage 10 concerts
  9Electric 8 concerts
  DevilDriver 8 concerts
  Fear Factory 8 concerts
  Lamb Of God 7 concerts
  Slayer 7 concerts
  Static-X 6 concerts
  Dope 5 concerts
  In Flames 5 concerts
  Nonpoint 5 concerts
  36 Crazyfists 4 concerts
  All Shall Perish 4 concerts
  Bleeding Through 4 concerts
  Born of Osiris 4 concerts
  Drowning Pool 4 concerts
  Mushroomhead 4 concerts
  Opeth 4 concerts
  Rob Zombie 4 concerts
  Slipknot 4 concerts
  The Pretty Reckless 4 concerts
  Unearth 4 concerts
  All That Remains 3 concerts
  American Head Charge 3 concerts
  Anthrax 3 concerts