I used to save all of my concert ticket stubs from the '90's (my decade of decadence). Best concert I ever saw was Metallica / Guns and Roses at Arrowhead Stadium in Kansas City, Missouri on September 17, 1992. Slam dancing in the mosh pit, so much weed you couldn't turn without a joint being passed to you, and flasks of alcohol being passed all around.
Guns and Roses showed up late, so Metallica played an encore set for 2 more hours! Oh, and Body Count opened the whole set with "Cop Killer" (which made all of the security folks just disappear). It was so loud, people living in Independence complained about hearing it. And the after-concert party in the parking lot was blasting, too. Ahhh, memories!