Off the top of my head...
Nazareth, FTH
Boxer, Crawler and Moon, FTH
Gordon Giltrap, FTH
Barclay James Harvest, Apollo & FTH
Manfred Mann's Earth Band (twice, can't remember where)
Surgical Supports, AGS
10CC, Apollo
Lindisfarne, Sheffield Uni x 2
Rick Wakeman, Sheffield City Hall
Gary Glitter, Sheffield Uni ball
Mud, Sheffield Uni ball
The Church, somewhere near London Victoria
Springsteen, Roundhay Park 1985
Crap Genesis (ie no Gabriel), Wrexham & NEC
Isaac Hayes, Indianapolis Jazz Festival*
(* Buddy Guy was playing when we walked in - we heard him, but didn't actually see him)
Sharon Shannon, Barbican
Caravan, Bar Cuba, Macclesfield
Roger Waters (with Nick Mason), Magny-Cours
Bill Bailey, somewhere in London
...and other stuff
This year I've seen Springsteen at the Emirates plus REM, Editors and The Guillemots at Twickenham
I turned down an offer to see The Stone Roses at Bowdon Vale and also spurned a Pink Floyd ticket in 1994 because I had a chance to take part in a football match at Witham Town's ground and decided to extend the repertoire of non-league pitches on which I've played (that'll be three - Witham, Sutton Utd and Melksham Town).