I'll just list the bigger names...
Biffy Clyro x3
Paul Weller
Foals
Michael Buble
Jethro Tull
Forward Russia
Travis x3 (Once for free as a result of meeting the band

Arctic Monkeys (Unfortunately)
Kaiser Chiefs
Kings of Leon x2
Stereophonics x2
The Proclaimers
My Chemical Romance
Foo Fighters
The Fratellis x3
Serj Tankian
We Are Scientists
The Commitments
Reel Big Fish
The Who
The Killers (Unfortunately)
Status Quo
Muse
Razorlight
John Mayall and the Bluesbreakers
Stan Webb's Chicken Shack
The Rolling Stones
The Eagles
Eric Clapton
Robert Cray
The Darkness
Texas
Jools Holland
Franz Ferdinand
Feeder
Radiohead
Elton John
Oasis x2 (2nd time unfortunately)
Tom Jones
Queens of the Stone Age (T in the Park)
Avril Lavigne (TitP)
Maximo Park (TitP)
Scissor Sisters (TitP)
I just love live music! And I'm lucky to have parents who love live music too, who took me to heaps of gigs when I was younger! I'll sit, stand, lie, whatever!