Although I saw Queen at Wembley in 1986 and the Wall at Earls Court a few years later I think the best gig I've seen was John Martyn on a snowy night at Bradford University in 1982. Most of his band didn't make it so he had his bass player and a drum machine that he'd borrowed from somewhere. He also had his amazing home made guitar and box of tricks. He was in a foul mood (as usual) but after a couple of numbers realized he had an audience who just wanted to see him play. He played a lot of acoustic tracks and several of his classic songs (Dealer, Big Muff etc) on his amazing guitar. It was just a great night - anyone who was there probably still remembers it.