NYC is certainly the best city in the US.

This is a very bold and subjective statement. I don't disagree it is the best city in US for some people, but the objective best - I doubt it.

We shouldn't talk about "objective best" without pinning down what that means. I can only really imagine it in a sort of Aristotelian sense - a city could be the best city because it most fully embodies the notion of what it means to be city (as opposed to a more rural or suburban area): a usually cosmopolitan agglomeration of people where the density/economies of scale/competition create an environment that allows art, culture, entertainment, public services, etc. to flourish. In that particular sense I think NYC is the clear best city in the country, no competition, with maybe Chicago being a somewhat distant runner-up. In that mode of thinking it's arguably the best city in the world, actually.

Now, that said: when I lived in the US I (mostly) preferred living in Seattle over NYC for the weather, natural beauty, and more laid-back vibe...subjectively Seattle was better for me, but I still don't have an issue with saying NYC is "objectively" a better city than Seattle.

> In that particular sense I think NYC is the clear best city in the country,

yes. if you don't like cities, you won't like NYC. but as far as "city" goes, NYC is the clear best and I don't think it's particularly close.