That depends who you ask - Vietnamese, Iraqi, Afghani, heck whole middle east, almost whole north Africa? Chile? Nicaragua? Cuba? Russia? China? And so on? Not so much.
Generally US tries to represent freedom and democracy and be the force of good, but they often ending up representing it in pretty horrible and messed up ways which end very far from these ideals. Road to hell is often paved with good intentions, isn't it. So no, too strong US ain't very good for rest of the world, quadruple that with current leadership. I am not saying China or russia are better, or even equal, far from it, its rather loss in each direction.
Iran is a bit special in its absolute hate for Israel and a bit whole west, but thats purely wet dream of ayatollahs that came to power after 1978, till then they were regional friends and one of best western partners. That revolution weas triggered purely by utter incompetence of CIA and british MI6, so thanx guys for fucking up entire region for everybody.
I don't think there is a single country in this world who would welcome them becoming nuclear power - not russians, not chinese, and definitely nobody around them. But maybe its too much to expect from reality - it would require such a massive ground invasion that US is not willing to wage (and pay for) and it would take a nuke to NY or similar level to trigger it.
