I'm such a city-girl. I always forget that MEC is so close and has so much stuff! I'm all for hiking, as long as I can take a shower and relax in a temperature-controlled room with a bed afterwards.
Things I've found at MEC tend to be for my international travel adventures (Bali, Thailand, Japan, etc...) :
Adapters for plugs
Bug spray with DEET
Stay-dry bags
Money belt
Super warm gloves for cross country skiing
Rock-climbing gear- for my indoor adventures
Patches/repair kit for my indoor-only aerobed.