very first: Metallica, Pantera and Monster Magnet, the most freaking awesome and crazy concert I've ever been to.. this was 1999. last: Tool, Puscifer and Primus awesome concert too. I was in tears at some point of the Tool concert when a song made me remember a lost friend. :( others: Black Sabbath, ACDC, Rammstein, Tony Levin, The Horrors, Deep Purple, King Crimson, Depeche Mode, Korn, Chris Cunnigham, Cypress Hill, Kap Bambino (this girl is fucking crazy!), Avenge Sevenfold, Megadeth, Bob Dylan, Apocalyptica many times, Placebo, Mars Volta, Smashing Pumpkins (the new lineup), Kiss, Motley Crue, others I can't remember so maybe they weren't as memorable. Cheers!