Queen w/Mercury - Maple Leaf Gardens 1980: First big time concert. I was 14 - that was an awesome show.
The Verve w/Richard Ashcroft - Phoenix nightclub 1997: I was sitting up on an afixed high bar table - Ashcroft was about 3 metres away. The ambiance in the room that night was like we were all having a collective epiphanic religious experience lol...
Supergrass - Opera House 1995: It was a total party!
The Flaming Lips - Opera House 1996: They used thousands, and I mean thousands, of Christmas lights on stage. It was one of the best, and original, lightshows I'd ever seen lol..
Nirvana - Lee's Palace 1990: The show didn't make a major impression, but on hindsight it was cool seeing them before they blasted off to Neverland fame...
Blur - Lee's Palace 1991: They were unknown then. Got to mean Damon Albarn - what a total poser he was!
U2's ZooTV tour 1992 - Exhibition Stadium: Got to dance w/Bono - that was pretty cool..
There's alot more, but those are the first few that come to mind..