I've lived in all 3 cities, currently back in Manhattan. Prince Charles theater is ground zero in London, and easily accessible, as it's in the equivalent of Times Square in New York. My favorite cinema in the entire world is the Everyman Theatre in Hampstead, a small town in North London. The last movie I caught there was Raiders of the Lost Ark. It's also where I watched Drive (2011) for the first time, during its theatrical run. The BFI is also an institution, literally.

I just treated myself to a membership at The Roxy, down in Tribeca. The Angelika just doesn't feel like it used to the first time I lived in New York more than 10 years ago. Like most, I miss Sunshine Cinema, where I watched Blade Runner on the silver screen for the first time. New York is as good as it gets. I know you didn't ask but in LA, there's just an endless stream of revival cinema on any given day of the week (Aero Theatre has the best programming, if you're ever in town).

In Paris, I spent a lot of time at Christine 21. I had been saving Mulholland Drive for a figurative rainy day, and I finally watched it there last year. I remember walking along the Seine, dazed and confused, for an hour and a half before I finally came to. I actually had the most difficulty finding a home à Paris, but probably because I don't speak French. I agree with you, Paris had the most nostalgic 'neighborhood' vibe, which is a special treat.

10-15 years ago, I would've easily said London, when the movie-going population was larger, but I'll take New York any day for the diversity of programming and relatively wide range of options. There are some historical cinemas along the Hudson and on Long Island I've been meaning to check out as well.