I'm not particularly proud, but I feel lucky to be an American. While the country has its flaws, it is a great place from which to be and I am happy to have grown up here.
I should note that I believe the idea of pride belongs to something you accomplish rather than how you were born. Like, I am proud of myself for putting in the work to be able to run marathons, but I am not particularly proud of being tall.
As the token gay guy on the site, I know that somebody will probably bring up gay pride in retaliation to my above argument. The idea of gay pride is more, "don't be ashamed of who you are," rather than, "I am so psyched because I am gay and you guys suck because you aren't."
I am not going to come down too hard on people who are proud of being American. But I sure as hell don't think conservatives who are flying flags all over the place deserve a place in line ahead of me as more American. That is just all flash and no substance. Try to be a good person and appreciate what you have, because others in this world have it much more difficult than we do by no fault of their own.