BTW, when asking "Which make the United States look the worst?", are you talking about what the rest of the world thinks?
Because when it comes to what the rest of the world thinks about the US, I believe none of those actually matter much.
I mean, people in the rest of the world may make fun of fat americans when the topic comes up, but in practice people will hardly care. People are always thinking selfish - why should some pakistani child care if Mr. Smith in Ohio is overweight, smoking or poor? There's no apparent way it would affect his own life. He won't care, just as you don't really care if some child in Pakistan lost his father in a drone attack. You'd start to care if that traumatic experience turns that child into an extremist who wants to take revenge against the country that operated the drone by becoming a terrorist.
People care about the things they believe might somehow affect their own lives, so it's rather things like american foreign policy that actually shape what people think about the US (and, in extension, the US population, for they are considered responsible for voting people like George W. into government).
So people in other countries are in practice much more outraged about things like NSA spying, and the general impression that the US is more and more turning from the moral authority it was considered for decades to something like an oppressive hyprocrite regime that gives a fuck about international law, human rights, tortures people, turns country after country into chaos etc., killed hundreds of thousands of innocent civilians etc.
