What do I like American Etiquette?

Since there are many differences between Japanese etiquette and American one, I got many unexpected mistakes when I came here. I can't say that which is better but I have lots of aspects which make me like American etiquette. In terms of language, when someone sneezes, they say "bless you"even if they don't really know her or him. I like this costum because I feel good and be blessed by them while they don't care about what this word means just custom. Moreover, I love to see people who go through looking at others with smiling even if they don't know each other. I think they are really friendly and smiling makes me happy. I can say that American are really friendly and open to others. That is what I like American etiquitte.