I base a lot of my perceptions on things I've seen in real life.
Such as Italians are terrible drivers when compared to Americans. Anyone who was stationed at Sigonella will know what I'm talking about. Now some may claim that they are no worse than Americans. And we would at this point disagree. (No person in their right mind would argue they are better drivers!) And I would leave it at that. But some would go so far as to call me a Nativist or Ubernational because of my personal observations. And that's where they lose me.