I am a very skeptic fan of Darren Aronofsky. I hated both The Fountain and Requiem for a Dream but am a huge fan of The Wrestler. And if I'm honest, Black Swan mostly intrigued me for the "sex" scene between Mila Kunis and Natalie Portman. The movie ended over an hour ago and I can't atop thinking about it.
Portman was brilliant. Absolutely brilliant. It's very disappointing to see her in other films, not living up to her potential and this one nails it. She should win the Oscar, easy. The movie itself wasn't an original story (a take on Swan Lake, in case you didn't already know) but she made it brilliant along with her. And Aronofsky's direction somehow lifted the mood of it even higher. His freaky-ass story-telling and weird methods match Portman's psycho-breaking method perfectly. I don not think this movie would have been as good if not for Portman's performance. With it, however, I say watch it. Her alone makes it worth the two hours.