Well, the "greatest country on Earth" crap does piss me off.
Well, you can admit that the fundamental idea of the United States of America is great. The one proud thing about America is that it has managed to sustain freedom and remains one of the most democratic and free nations in the world. As many problems as there are in America, we are still undoubtedly quite great. I agree that our arrogance is unjustified, although I believe that the crazy nationalism has more to do with a small minority of people.