"America is a large, friendly dog in a very small room," observed British historian Arnold J. Toynbee. "Every time it wags its tail, it knocks over a chair." And Spanish poet Federico Garcia Lorca said, "The only things that the United States has given to the world are skyscrapers, jazz, and cocktails." Opinions of America are like bellybuttons — everybody's got one.

Funny thing about being an American living away from America: It makes you think more about what it means to be an American. But which is the dominant sentiment? Absence makes the heart grow fonder. Or out of sight, out of mind. The answer depends on a lot of variables. Over the years, various people and projects have explored those variables: the mechanics and meanings of expatriatism.