In reply to mux:
The Who, Leicester Granby Halls, 1975
No 2 was probably Led Zeppelin, St George's Hall, Bradford, 1972
No 3 was probably Eels with Strings, Albert Hall, 2006, or it may have been British Sea Power at Pressure Point in Brighton in 2006
And then hordes of them...the Stones, Yes, King Crimson, Fairport, CSNY, Jefferson airplane, Pink Floyd, Dylan, Camel, Small Faces, ELP, Leonard Cohen, just far too many to mention.
One that really stands out from early on though was Vinegar Joe at Bradford Uni in 1972. Never liked Elkie Brooks or Robert Palmer as solo artists, but that night the whole place just rocked. Superb.
And a few weeks ago I saw Tiny Tin Lady in a 60 seater venue in Maidstone which was a superb intimate show...lots of chat to the audience and some really good musicianship from the girls. Not in my top 10 ever gigs, but the best gig I went to in 2008.