There are a few things that I recognize interesting in the US´s culture. One of them is the passion for every single activities that the people organize and participate.
For example, I went to a Medieval Fair a few months ago. Everybody used costumes, even the older people. It was weird, because in Chile, nobody -including me- have enough personality to be exposed in that sense. Ok, maybe in a few contexts like Halloween or chilean version of the Comic Con.
I also participated in a game where more than 300 people participated. The name of the game was “Humans and Zombies”. Nobody can imagine how the students truly believed that they were protagonists of this game. They really believed that they were humans killing zombies or vice versa.