How many times must commenters write in to say that Canada is Not a Colony? We have been our own country, our own home, for eight decades, and this was confirmed in the 1950s, as has been well-stated above. Petulant (and uninformed) people who want to rock the boat for their own advantage, or out of sheer mischief, had better think twice. Canada is one of the last solid democracies in the world at the moment -- despite what  eccentric commenters like Rochedale and julejim say. 
If it works, don't fix it. Smoke up, dream on. You tinker at your own peril.