Updated to add a couple new ones.
Airbus:
A310-300 (Wardair, Air Transat, possibly Canadian Airlines)
A319-100 (Air Canada, Air Canada Rouge, American Airlines, Frontier)
A320-200 (Air Canada, Skyservice, Air France)
A321-200 (American Airlines)
A340-300 (Air France)
Boeing:
737-200 (Canadian Airlines, possibly Air Canada)
737-700 (Westjet)
737-800 (Alaska Airlines, Westjet, American Airlines)
737-900 (Alaska Airlines, United)
757-200 (Delta, American Airlines, Harmony Airways, Royal Airlines, Air Transat)
767-300ER (Air Canada Rouge)
777-300ER (Air Canada)
Beechcraft:
B1900D (Central Mountain Air)
Bombardier:
DHC-8-100 (Air BC, Hawkair, Central Mountain Air, Canadian Regional Airlines)
DHC-8-300 (Air Canada Express/Jazz, Time Air)
DHC-8-Q400 (Air Canada Express/Jazz, Horizon Air, Westjet Encore)
CRJ-100 (Air Canada Express/Air Georgian)
CRJ-200 (Air Canada Express/Jazz)
CRJ-700 (American Eagle)
CRJ-900 (American Eagle)
Cessna:
182 Skylane (Skydiving, Private Flight)
Embraer:
E190 (Air Canada)
Lockheed:
L1011-150 (Air Transat)
McDonnell-Douglas:
DC-10-30 (Canadian Airlines)
The aircraft I've flown in the most would be the DHC-8-Q400.
Maybes:
A330-200 (Air Transat) - One of my flights may have been this instead of the A310-300.
ATR-42 (Canadian Regional Airlines) - possibly.
727-200 (Air Canada) - This one I am not 100% sure about as I paid less attention to aircraft types when I was young, but it's very likely I did.
737-600 (Westjet) - A couple of the flights I thought were in a -700 may have been done in a -600.