I'd say that it's a culture where if you decide to be arrogant, loud and stupid, it's accepted. It's one of the archetypes of how to be American that's generally accepted. It doesn't mean that every American is like that, or that those kinds of people are loved and celebrated by other Americans. But, if you're a young loud, arrogant and stupid person, you'll find a lot of role models. You even get a lot of loud, arrogant smart people who play stupid because people like that more.

I think Canada tends to emphasize humility a lot more than the US. Probably a trait borrowed from the way the upper classes were supposed to behave in the UK. So, you get a lot of skilled people who are humble: Wayne Gretzky, Ryan Reynolds, Keanu Reeves, Steve Nash, Georges St. Pierre, Christine Sinclair, David Suzuki, etc.