Even before I arrived in the US , I had read about materialism & Individualism being two major traits of the American society. Individualism, Yes. It's one of the core pillars , I believe, on which the American society rests. To put it bluntly, people believe in minding their own business and would appreciate it to a large extent if you too did the same. Privacy laws are pretty stringent in the US and that's just reflective of the Society. Having said that, Americans can be pretty fun loving people to socialise & mingle with; provided you know very well where to draw the lines.
But an interesting observation in such an individualistic society is lack of Corruption. 8 months in this country and I haven't seen any instance of corruption happening anywhere before me publicly. That's something I believe one needs to appreciate Americans for, for they always put the society/community above one's own self interests. To a large extent, American materialism is not blind enough to make money through whatever way possible. Make money; but through legal & ethical means.
'Dignity of labour' is another trait which I liked here. A person is respected immaterial of the work he does. All work is deemed important by the society & moreover anyone doing any Job is proud of the work he does. You can find people saying ' I am a plumber' with the same facial expression with which you see an Indian 25 something saying ' I am a software Engineer' :)
Finally I believe 'respect for merit' is what helped America reach the heights which it has attained today. No one shies away from appreciating you if you do something nice. Everyone values the job you are doing. Building a meritocracy is what most American firms are well known for. This attitude, I believe also delivers effectively in helping build a largely non discriminatory workplace.