OK, i just watched Naqoyqatsi, and have to say i was disappointed. Not much that will really stick with me. There seemed to be a definite lack of the visually stunning images I remember from the other 2. At least half the movie uses the film negatives, often of mundane things, as if the use of the negative is supposed to make it more significant, somehow. It seemed disjointed, and jumped around a lot rather than flowing from one idea to the next.
Then again, I saw each of the other movies in the theater, while i watched this one on my 20" monitor. I'm sure that made a difference.