There is this brutal reputation Americans have overseas. If you talk with people from Europe or Asia or South America, they almost all have the same impression of American tourists. You know it, "THE UGLY AMERICAN." We are loud, obnoxious, clumsy, rude, and entitled.
Now, I am sure when you travel, you are none of these things. But whether or not you are, people's first posture towards you is most likely girding themselves up to deal with the ugly American. It is a witness that makes traveling less fun for those of us who enjoy cross-cultural travel.
Whether we realize it or not, we are a witness. Our being is forming or conforming a brand for someone else. The way we live is a witness to our nationality, to our school, to our business, to our political party, and mostly to our faith. We are not natural wanderers. We tell a story with our very existence, so we need to take the most of every opportunity.