I had a period where I saw bands regularly. From The Groundhogs in the back room of a pub in Croydon to Led Zeppelin at Knebworth.
Pink Floyd, Led Zeppelin, Iron Maiden, Black Sabbath, Ozzy, Rush, ELO, Rory Gallagher, Frank Zappa, Captain Beefheart, Marillion, Motorhead (several times), Elbow, Joe Bonamassa, The Damned, Dr Feelgood, Gary Moore, Matt Schofield, The Groundhogs and others that I can't remember for the moment!
The best were probably Pink Floyd - The Wall, Elbow at Cambridge Corn Exchange
Worst: Gary Moore - After The War tour and Rush - Roll The Bones tour.
It was the Rush gig at Wembley Arena that put me off going to big venues. I'd seen them twice before and they were brilliant musicians, but the sound at that gig was awful, so I decided that I'd had enough of the big venues!
Regret not seeing Bon Scott era AC/DC (although I did see a really good tribute band that played all that era stuff) and Stevie Ray Vaughan. He was due to play in the UK, but was killed before the tour.