Good points above... I apologize to my northern neighbours and have modified my post accordingly.
In my opinion Manitoba and NW Ontario are close with regards to travel.... it's a big distance from the western edge of Ontario to the east. In Manitoba the biggest city (Winnipeg) is closest to Ontario and the majority go east (and some north) to camp, etc. due the number of lakes that way. The people in NW Ontario can check out the prairie section if they are close to it.
Manitoba is definitely a prairie province.
I can't speak for everyone but I and the people I associate with identify more with Western Canada.... not the east. I'm sure there are plenty of "city folk" that identify with GTA.
I don't consider Ontario to be Central Canada. The exact centre of Canada is Manitoba... a town called Landmark actually is the closest to the geographic centre.
I agree with lumping the Prairie Provinces into one as previously mentioned.... singling them out like I did isn't good for the reason stated above by
@dblack and I withdraw my suggestion
I gotta say, it's nice to see some conversation in here about Canada though
Makes me think there's a future for OB here.