Damn way too many. Mostly multiple times for the same metal bands. Club shows outweigh the stadiums but looking back through my ticket stubs I wonder how I had time to see em all...

Armored Saint x 43+ ( I know theres more though...)
Slayer x 27
Anthrax x 22
Megadeth x 17
Metallica x 30+
Bludgeont x 40+
Iron Maiden x 12
Kiss x 7
Raven x 15+
Judas Priest x 20
Carcass x 8
Black Sabbath x 10
Ozzy x 15
Dead Kennedys x 9
The Cure x 12
Joe Satriani/G3 x 20+

and tons of others...

Van Halen
NoFX
Ratt
Twisted Sister
Marilyn Manson
Avenged Sevenfold
Bolt Thrower
Duran Duran
Depeche Mode
Pink Floyd
Guns 'n Roses
Phish
Motley Crue
Molly Hatchet
Quiet Riot
Grateful Dead
Pennywise
Napalm Death
Tenacious D
Triumph
the list goes on and on and on...

And my first concert ever with my family..
The Bee Gees <---- No really.. in 1978 with Sister Sledge (We.. are.. family...)