Linkin Park (2x)
Metallica (2x)
Limp Bizkit
Nickelback (2x - and I would NOT go EVER again unless they were an opener for someone worthwhile)
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Deftones (SUCKED)
Mudvayne
Yanni (teehee)
Garth Brooks
The Judds
Emmy Lou Harris
Bif Naked
Matt Good
Swollen Members
Foo Fighters
Godsmack
Hoobastank

I know there is more but I can't think of them right now. Metallica puts on the best show EVER