Differences I saw here are a lot. People seen to acknowledge your pesnce. You know the person or not, you stiil smile and talk. I was spoken to by a lot of people in the lobby.
Movies show blacks in bad light. A nigerian went out of the way to help me reach my place in the US.
Cars are a necessity here, not a luxury.
People follow rules, in all walks of life. Be it driving, crossing the road or anything.
People here are open. They admit they were wrong if they were so, and also expect you to.

many more to come