Oh oh, your asking for trouble!
I know what you mean. We are the keystone province that unites east and west; quite unique and something to be proud of. I don't mind being affiliated with the east; I"ve always loved NW Ontario myself; it truly is Manitoba's playground. We do share an ocean body with two eastern (central, depending on your pt. of view) provinces, plus we have lakes that can, IMO be considered as "Great Lakes". But we are considered a "western province" by definition, so it really does depend on the point of view. When I am in the Canadian Shield, I feel like I'm in the east (since it's so close to Winnipeg, I was there quite often), but once on the prairie, it feels west. Basically, "east" is east of Winnipeg, and "west" is west of Winnipeg".
This should be interesting!