Americans manners

There is one thing that I really dislike about American, especially guys. They like to spit on the floor a lot... In Hong Kong, you will get a $300 fine for doing that, so I have never seen people spit wherever they want before I came. I have talked about this with my friends and they told me it is because they are used to be on the football field. Well, I understand the need of spitting on football field but I am really annoyed when I see them spitting around.

I like how Americans would greet people nicely even though they are not that closed. This shows their friendliness ,and it helps to avoid those awkward moments when you see someone that you dont know what to talk about.