ive been lucky. between living in hartford and denver. ive seen mario, wayne, yzerman, sakic, forsberg (all the avs), sundin,mogliny, bure in his prime, fedorov, roy, lafontaine, jagr. just about every great player from the late 80's to present. i havent seen kovulchuk and heatly yet though.
the most singlehandedly impressive player, believe it or not was jagr in when he was in pitts. he was the one player ive seen live that couldnt be stopped. i hated him, we didnt have a chance with him on the ice. it was great to see all the others, but he alsways impressed the most. ive seen sakic and forsberg do some amazing things live, as well.
Mario Lemieux. Being a Penguin fan from NJ I was thrilled enough to go to Pittsburgh for my first game at the Igloo. Even though it was a 9-4 loss to the Whale, Lemieux scored all 4 Penguin goals and broke the record for SH goals in a season.
Oddly enough, my presence in the stands always seemed to rachet up Benoit Hougue's performance for some reason. I probably caught three games where he was playing, and I swear, he must have had 10 points in those three games.
Saw him as a King in the early 90s at Maple Leaf Gardens, saw him stopped by Peter Ing of all people once on a breakaway and once on a penalty shot. He also had 2 goals that game in other situations though. A dominant performance.