Our Bread Tastes "Sweet"
White bread in America actually has a weird sweet flavor that isn't common anywhere else. Most countries favor tastes like sourdough or robust, herby flavors. But in the US, white bread and the dreaded Wonder Bread are top tier.
Expecting Free Drink Refills
Believe it or not, free refills aren't a normal thing. Unless you're only ordering water, don't expect to have your coffee or soda topped off without being tacked onto the bill at the end of your meal. It goes without saying in restaurants in other countries that you'll pay for your extras.