I saw Pantera in summer of 2000. Went backstage too.
You lucky motherfucker.
Only people I have ever met in a "backstage" environment were Sir Mix a Lot, T-Pain, Bubba Sparxxx, Ying Yang Twins, Coolio, Dirt Nasy, and Akon.
Sir Mix a Lot is fucking hilarious and super down to Earth, approachable and generally a nice guy
T-Pain is super approachable too and really, well, normal
Bubba Sparxxx was the same way as the above. We bought his group too much Jack Daniels for backstage so they gave a bottle each to the bouncers (was Gentleman's Jack too)
Ying Yang Twins were douchebags. Treated the bounce staff like we were their personal pimps "hey, go get that girl for us" and shit like that
Coolio was cool but also tried to sneak underage girls in through the artist only entrance
Dirt Nasty was a piece of shit. Fight started and most artists will stop and tell the crowd to stop. He egged them on and it exploded into like a 20 person brawl with only 5 bounce staff to break it up.
Akon... well... it's Akon. Guy kept lighting up joints on stage when in WA that shit's illegal to smoke in a LCB controlled business and we had to keep slapping it out of his hand.