Insomnia (2002) - Solid thriller from Nolan, though it's probably my second least favorite of his (not that that's a bad thing, as I like all of his films). Part of this is because it lacks a certain air of "Nolanness," and the other part is because I find the 1997 Norwegian original superior, which I admit is unfair as remakes are always a "damned if you do, damned if you don't" situation.
The Science of Sleep (2006) - A sci-fi romance from Michel Gondry where a man's perception of what is dream and what is reality blurs. I love what Gondry does with the dream aspects of the mise-en-scene, he's brilliant with visuals. The film is unsuccessful, however, because the story goes on for a bit and then just stops. It reaches a point where what is dream and what is reality becomes more difficult to discern, which is engaging, but ultimately there is no resolution. I'm sure Gondry's intention was for the film to feel as dreamlike as possible, which I commend, but I still can't help feeling unfulfilled at the end.