Gee i think the last real big concert i went to was Alice Coopers "Welcome to my nightmare", it was the best big one that is for sure, that was back sometime in the early 80's i think. Before that i think i was out of my mind and too young and stupid and went to 2 Bay City Roller concerts.
Sherbert was another i saw. Apart from that i have been to Jesus Christ Super Star, Andrew Loyd Webber musical in the early 90's, that was fantastic. Seen some good oldy bands playing at the local pubs here like Barnsy and that sort of thing. But that is it. They are just to expensive to go see nowadays.
Would love to go see Rod Stewart but it's just too dear.