One other aspect is the extreme degree of federalism in US. When looking at it from the outside, people generally tend to pay more attention to what's happening on the federal level. But in truth, state and local politics are much more relevant to day-to-day stuff, and there's a very broad range to pick from when deciding which state to live in. Of course, in practice you also get limitations like "where can I actually find a job?" etc; but there's still plenty of options).

And state and especially local politics are easier to influence, too. State politics more so in states that have some form of voter initiatives (which mine does), which rewards grassroots bottom-up efforts.