Sometimes great movies don't always strike you that way at first. Repeat viewings may be necessary, or perhaps a little time needs to pass before you can really appreciate the film's understated magnificence.
And sometimes they're just pieces of crap. Case in point:
What Happens in Vegas * - I've been to Vegas quite a bit, and I somehow always miss out on the magical experiences all these movie people seem to have. Of course, I'm neither as cute as Ashton Kutcher nor as leathery as Cameron Diaz. Fun fact: I didn't realize she has six years on Kutcher. Time sure has flown since The Mask.
Speed Racer **1/2 - I really didn't understand all the negative press for this. Apparently everyone else was expecting Pixar. And as obnoxious as it was, it was still better than the cartoon.