I don’t view the USA as the center of the world - i see America as an overreaching empire that has had it's heyday. If you take a historical perspective this is how many empires fall. They overreach by trying to annex large parts of the world, spend all of their resources doing so and eventually implode. The British and Roman empire are good examples.
I stopped calling myself a Christian - the fact that many Americans are so religious is just utterly strange, and somewhat frightening. If the Danish prime minister started confessing her belief in a god she'd be laughed out of the room.
I occasionally felt embarrassed of America - I have a mixed relation with America. On the one hand it's a great country with amazing and open people that will gladly help a stranger, and has an amazing work ethic. On the other hand I have a problem with Americans not knowing or caring about how the rest of the world functions, how Americans define themselves in terms of their job, and their aggressiveness on the Geopolitical arena.
I believe America’s time as #1 super-power will come to an end within my lifetime - I think this is already happening.