So, here is as list of all the concerts I have attended.  When you see ? that means I can't remember.  Bands in parenthesis are the opening act.

ALL
 91? (?)
Deep Purple
 87 (Bad Co.)
Fishbone
 91 (The Urge), 93 (Biohazard), 98 (De La Soul)
Flotsam & Jetsam
 90 (Prong)
Guns N Roses
 91 (Skid Row)
Don Henley
 89 (Edie Brokel)
Billy Idol
 92? (Gene Loves Jezebel)
INXS
 92? (?)
Iron Maiden
 87 (Waysted), 90 (Anthrax), 92 (Testament, COC), 00 (Queensryche, Halford)
Jesus Jones
 90? (Ned's Atomic Dustbin)
Lollapalooza 92
 (Red Hot Chili Peppers, Ministry, Soundgarden, Pearl Jam, Ice Cube, Jesus & Mary Chain, Lush)
Lollapalooza 93
 (Primus, Alice in Chains, Fishbone, Rage Against the Machine, ???)
Lynyrd Skynyrd
 91 or 92? (Charlie Daniels Band, Drivin' & Cryin')
Matchbox Twenty
 01 (Train)
Metallica
 92 (Metal Church)
Motorhead
 02 (Speedealer, Morbid Angel)
Opeth
 03 (Lacuna Coil, Beyond the Embrace)
Queensryche
 91 (Suicidal Tendencies)
Rage Against the Machine
 92 (?)
Ratt
 91 (Saigon Kick)
REO Speedwagon
 88? (The Fabulous Thunderbirds)
Rigor Mortis
 90 (?)
Rush
 91 (?), 92 (Mr. Big)
Joe Satriani
 90 (Overwhelming Colorfast)
Bob Seger
 86 (Georgia Satellites)
Stone Temple Pilots
 93 (Butthole Surfers)
S.O.D.
 99 (Skinlab, Crowbar)
Suicidal Tendencies
 92? (Infectious Grooves)
Testament
 90 (Savatage)
U2
 92 (Big Audio Dynamite, Disposable Heroes of Hiphoprisy)
Van Halen
 89 (?), 92 (?)
ZZ Top
 86 (Jimmy Barnes), 89? (?)