Americans talk loudly and tend to be less mindful of the area around them. There’s this tendency to take up more space. Not necessarily in the sense of putting your bag on the seat but just big arm movements when talking, leaning, stretching legs. Not that every American I met did that, but enough to be noticeable. At least here in Germany people on average try to take up less space when in public.

There’s just this general air of “confidently doing something without knowing what they’re doing”. Other tourists tend to be more careful, ask how to do something or show they are insecure about how things work in a foreign country.

Americans just tend to take up more space. With their body language, their voice… I’ve met quite a few through language exchange groups and like 80% of the time you can tell their nationality before you talk to them.