An almost-classless society: I've noticed that most Americans roughly have the same standard of living. Everybody has access to ample food, everybody shops at the same supermarkets, malls, stores, etc. I've seen plumbers, construction workers and janitors driving their own sedans, which was quite difficult for me to digest at first since I came from a country where construction workers and plumbers lived hand to mouth.
Also, (almost) all sections of society are roughly equal. You'll see service professionals owning iPhones, etc. as well. This may be wrong but part of it has to do with the fact that obtaining credit in this country is extremely easy. Anybody can buy anything, for the most part, except for something like a Maserati, obviously. As a result, most monetary possessions aren't really status symbols. I believe that the only status symbol in America is your job, and possibly your educational qualifications.