Your understandings about Canada are incorrect, both culturally and as they relate to the administration of justice. Culturally, there vast regional differences. If you do not think so, I suggest you take a trip east, visit Quebec, where in my lifetime there have two referendums about separating from Canada the last narrowly defeated, and then head off to Newfoundland and Labrador, the most recent Canadian province but for forty years prior to that was the Dominion of Labrador. After that you might wonder by the Territory of Nunavut, where reflecting the predominantly Inuit population 70 per cent of residents report their mother tongue as Inuktitut. Stop by the only officially bilingual province, New Brunswick, or head to Nova Scotia, where the accents retain strong Celtic traces. In my province, Saskatchewan, European settlers were predominantly from mid to Eastern European areas, and if you go to a wedding in Saskatchewan, do not be surprised to see perogies and cabbage rolls included at the dinner, especially if you are in a rural area.
Any Canadian, however, reading your post would likely laugh, and maybe even out loud. Something that has been a subject of debate, dialogue and discussion for at least my lifetime has been: what is Canadian culture anyway?
This is not to say that the national culture does not exist, and in my opinion the symbolism associated with national identity is becoming stronger.
As it relates to the administration of justice, again, you are misapprehending the way that it operates. I started a long explanation and then realized that the wikipedia would do just as well.
On to typical American traits:
I would agree with others that many Americans tend to have exuberant personalities, comparatively speaking. That can translate to being outgoing and friendly with a willingness or even eagerness to engage with strangers, and it can also translate to seeming loud in smaller or confined spaces.
One that I haven’t noticed yet being commented upon yet, is that many (certainly not all) Americans truly seem to believe that everyone else on the planet really wishes that they were American and is eagerly awaiting the opportunity to become so. For those who exhibit this trait, there seems to be paired with it a seeming foundational assumption that things American are the best in the world, for example, the best political system, or the best judicial system. I’m sure it comes as a surprise to the Americans on the board that many non-Americans. are pleased for you that you love your country, but they think theirs is pretty swell, too.