I’d imagine a pretty high percentage of the people posting in this particular thread have seen them
Personally, I loved Black Swan when I saw it in theater. For me it mostly succeeded simply as an exercise in tension. I was on the edge of my seat the whole time, not out of any actual concern for the character, but simply due to what I saw as Arranofsky’s masterful use of craft. I wouldn’t bother watching it again, but those two hours in the theater were worth more than what I paid for the visceral feeling I got as a result from the sound, editing, photography, and direction.
Requiem for a Dream, I never really had a taste for. For me it was far too melodramatic, and some of it came off to me as rather cheap. The idea behind it is one I think could be executed better, even perhaps by Arranofsky himself.
As for Pi, it is what it is. I think it’s perfect at being the kind of movie it wants to be, but that doesn’t have much appeal for most of the world.