Suggestions, Please

The next paper my class will write is going to be an interpretation of a film. Last year, when my class was food themed, we watched Chocolat. That worked well, but I'd rather not use it again (partly because I showed a different Johnny Depp movie last semester). I was thinking of using Pleasantville, but I just finished rewatching it and, while there are subtleties in it that could make for interesting and unique interpretations, it clubs you so hard over the head with its main thesis that I don't think many students would look past that. So I'm in the market for a sort of literary movie - one that's rich in imagery, symbolism, and lends itself to multiple interpretations. Any suggestions?