Krzysztof Kieslowski's film "Blue" is sad and thoughtful and gorgeous. When I first saw it at the theater in 1993, I dismissed it as "boring." Specifically, I remember telling friends afterwards: "It was so dull, when I reached down for my popcorn at the end of the film, and then looked up, the film was over, and I hadn't realized it..."
What was I thinking in 1993? I was 28 then. I thought I'd suffered plenty. Perhaps I hadn't yet suffered enough at the time to enable me to fully appreciate the film.
I just watched it last night for the second time, and found it sad and beautiful and very far from boring...