Canada is a large and diverse country. It also lives with the imposing cultural presence of the US. Growing up in Canada, I never got the impression of a defined Canadian identity except for one thing: We are not Americans.

For me, nothing demonstrates that more than Canadian rejection of the "cultural melting pot" of the US in favour of "multiculturalism". I went to school in the age where we still sang God Save the Queen and recited the Lord's Prayer every morning, so it's going a fair ways back, but I remember actually being taught multiculturalism in school (which, as the perversity of this sentence shows, was perhaps an academic exercise). I distinctly remember being told over and over again: We are not American. We do not value a society with a single culture that absorbs other cultures. We value a society of many cultures that live together in harmony.

I think you will see a lot of variation wrt things like individualism in Canadian culture. For example, it is probably a strongly held belief in places like Alberta. But maybe in the small cities in Quebec or on the east coast, you're going to get a lot more responsibility for community. The string that holds it together, though, is the acceptance for a variety of insular cultures.

As other posters have mention, Canada limits immigration. I suspect that it would run into very similar issues to what the Australians have had to deal with in the past 30 years if it didn't. I always find it strange that my adopted home of Japan is probably one of the easiest countries in the world to emigrate to, but because of it's very strong mono-culture, immigrants generally do not stay. In spite of my upbringing, I enjoy living in a mono-culture -- a very embarrassing admission, and I invite all true Canadians to come and spit on me ;-)