Most Helpful Guy
I'm an American who was raised in the USA but who has lived in several countries; let me answer from that perspective. I'll recast the question: What traits do you see in Americans that you don't see as much in people from other places?
I sometimes think that Americans get along in a more genuine way with strangers, in one-on-one situations. They tend to be a bit more open and upfront, in a friendly way, with people they don't know. There is often little pretense, calculation, or cleverness, more just a willingness to have real contact. That's a good thing about Americans. :)
The most American thing I know is the American sense of humor, I think. There is overlap in "humor" around the world, of course, but a lot of American humor is unique, in my experience. And I'm not talking about sitcoms--those are dumbed down at best; most are odious. I guess humor is always impossible to describe.
When I lived in northern Europe , I noticed that when they subtitled The Simpsons, they never actually translated most of the jokes. The people doing the translation apparently didn't know what the jokes were, so they left many of them out. Also, I would sit in theaters and laugh my head off at hilarious parts of American movies and plays, and, even in England, I'd be the only person there who (seemed to) "get it," a lot of the time.
America is so rich and powerful, and has done so many awful things. But it's a beautiful place. In all the world it's the best place I know. It's complicated. But then again, so are Americans. :)0