Why are Americans so polite/formal compared to Europeans?
In Europe formality is pretty much non-existent. In Sweden we call teacher by first name and some kids even joke about calling their female teachers "mom". Everyone is treated the same like boss is your buddy and even strangers seem cold, especially cashiers.
In the US you have students calling teachers Ms/Mr last name. While common in parts of Europe it's slowly fading out. The friendly and polite behavior in America is also what I love, strangers call you miss/sir and greet you. People are overall kind and show hospitality, while I had to wait in another room when my Swedish friend had dinner with her family😭