In general, I don't think it has to be different here (I live in the US) than in the rest of the world. It's not as if we're altogether less sophisticated than other countries (I mean, some parts of the US, sure, but not in general).
The one main thing that does probably have to be different in the US is nudity. For some reason, probably a holdover from puritan settlers, nudity and sexuality is far more controversial here than violence is. I never really thought that made sense, that making life was more controversial than taking it, or that you could have a western show a graphic lynching at the hands of vigilante justice but god forbid a boob shows up or it's instantly rated R, but I'm just one person.