What 'superficial' movies actually have some substance?

Have you ever seen a movie which could easily be considered ‘superficial’ in some way—either in terms of material (comfort-zone plot, banality) or cinematography (amateurish, badly made)—which you feel actually deserves more consideration for what it’s presenting?

One example of this may not have actually been seen by many people because it’s a French film, called Molière. I’m not sure of the general public views on this movie, but I’ve largely heard it compared with Shakespeare in Love. It’s a comedy, and fictional. However, I find that it presents some really good questions concerning human relationships—and an exploration of the historical double-standard*—that makes it a worthwhile exploration of certain aspects of society.

Or maybe I’m just nuts! Have you seen any films which couch a deeper discussion within a less-respectable form?

* let’s not get into the issues of whether or not the double-standard still exists, please!