Whoa! Lotta posts here...lots of Canadian civvers, I see.
One caveat to non-Canadians (especially Americans) :
We Canadians tend to be a rather defensive lot when it comes to distinguishing ourselves from our worthy southern neighbours. So tread lightly, please, when discussing the merits of a Canadian civ. I, for one, don't feel its a glaring omission that Canada is NOT represented in civ. OTOH, if we're talking about adding other civs like Scotland, Israel, Korea (already done!), etc then why not Canada? There's lots of civs in the game that were never world or even local powers.
One caveat to Canadians: if we really want to distinguish Canada as a civ in its own right we need to emphasize the combined french-english history of our culture. That's what makes us really distinct from both the US and England as civs in the game. And I feel anti-US sentiments have no place here. Yes, the US co-opted the term "Americans" for themselves, when really its homologous to "Europeans" or "Asians", but get over it and don't substitute with a slur.
On the traits: after making my case for the Agricultural trait, I realized that if implemented the Canadian civ would grow fast in terrrain other than that which we actually got (mostly tundra and wetlands). On reflection, I wonder if Expansionism wouldn't better reflect our historical experience - like I don't think early Canadian explorers/settlers ever popped barbs from a goody hut, for example.
But if we accept industrious as well then we've the same traits as the Americans...
(oh the irony!).
So if the AI could be programmed to divert most food surplus fom Agricultural trait into supporting entertainers....
I really like the Cdn. Infantry ideas being tossed around. The roll of Canadian troops in both WW's is a source of national pride (and personal grief) for a good many Canadians. Despite my avatar I prefer this idea to the RCMP (mounties) unit.
Last thought: what abaout a UU based on the Natives (I forget which nation) who fought alongside the English in the War of 1812? They were pretty important, IIRC.