Synecdoche: New York

I just watched it, not expecting much, expecting it to be messy, expecting it to be what I had read it was about. It isn't. It's the best American film I've seen since Angels In America, which was made for HBO and relied entirely on writing.
Turns out, so does SNY. Charlie Kaufman's writing to be exact. If I had remembered that about the film, I probably would have watched it in theaters, but it doesn't matter.
Roger Ebert, who has improved immensely in recent years, named it the best film of the decade, meaning 2000-2009.
Here's the rest of his list, in case you'd like to experiment.