It's a subject that comes to mind more days than not lately.
Speaking with non-Americans about this country is always an interesting experience. I find myself defending my country verbally much more than I would expect. "Don't talk smack about my momma!"
I do make an effort to be realistic and not defensive. I did just spend a month in jury duty (however you want to take that!)
But really, for good, bad and worse, I am an American.