I'm from the US, and I see this country as the tallest of the dwarves, so to speak. If there were another, better country (maybe Canada, Australia, or New Zealand?) I'd move there. However, with Europe's economy in shambles, Central and South America being overrun by drug lords, Africa having little development to speak of, China's lack of freedom, and Japan's soaring debt, I think I'm in a pretty good place right now. Does that make me a patriot? Not any more than a tenant liking his/her apartment makes him/her an 'apartamentriot'. I've traveled quite a bit in my 15 years, and apart from some general American jokes (I'm not Mr. Popular anywhere) the Poles, Germans, Russians, French, and I have gotten along very well. It's all a matter of respect and self-awareness. Once you're 'in country' for a few weeks, you'll be well adapted.
The only reason that I can see for US citizens to be seen as 'annoying', though, is that tourists in general are viewed that way, and since for a long time US citizens had more money to travel, they made up a good chunk of tourists. However, xenophobia is also present in Europe, just look at how they treat Arab immigrants! Obesity, on the other hand, is present to a greater degree in the US due to cheap carbohydrates. Every country has its own good and bad points, and finding the right one is just like finding a good spouse- it can take a while but the search is well worth it.
-Penguin