Hmmmm, I'd say:

My Bloody Valentine
Daft Punk
The Pixies (though Kim Deal has left again, so may have to wait a while)

Bands I missed the boat on but would love to see if they ever did another show:

Sonic Youth
Lush

Jethro Tull

David Bowie (If he ever tours again)
Queen + anyone, really.
Dragonforce
The Megas
Jonathan Coulton
The Who

Was dying to see The Smashing Pumpkins & wish finally fulfilled. Great live act.

But Kasabian are by far the best rockers in the world at the moment. They know how to pull a crowd into their performance & you can't help but 'Get Loose, Get Loose'. Brilliant!

Check out some of the live clips on youtube.

Mine was Tool, but I saw them, twice, so all is good.

Me^ Too.

Rolling Stones... before they die.

I always wanted to see Michael Jackson.
I grew up listening to him and it was so upsetting knowing I will never experience one of his performances.

OASIS upon their return..............

Broken Social Scene
St. Vincent
Amy Winehouse :(