[PeppyGPhiB]

The only movie I've ever walked out of was Spice World, when I was in college. We snuck into As Good As It Gets just as it was starting. At the end, one of my friends yelled, "That was waaaay better than Spice World!"

An example of a movie that makes you work hard to understand it, but it's worth it: Momento.

Examples of movies that make you work too hard to understand them, and I still don't get it: Vanilla Sky, Magnolia, Mulholland Drive. Vanilla Sky was a tough one for me, because I otherwise love Cameron Crowe.

On the other hand, I like many of the movies mentioned earlier in this thread and even own a few of them (Moulin Rouge, Eyes Wide Shut, Gladiator, Catch Me If You Can, The Hangover).