Metallica, Antrhax,Megadeth, Slayer, Alice in Chains and Alice Cooper twice, Opeth, Paradise Lost 3 times, Cyinc 4 times
Back in they day I had a friend who had a ticket business, so I used to go to concerts pretty much every weekend. Can't even remember half of them at this point, but the one's I do remember...
Billy Idol 3x's
Queensryche 5x's...even flew to Denver to see them twice
Guns N Roses 3x's
Seventh Void 5x's
Dream Theater 5x's
and a bunch of other's