Recently, Criticwire asked reviewers to select the best filmmaker under 40. Many responders picked Sarah Polley, and her latest film, Stories We Tell, is probably a big reason why. The actor-turned-director's first two movies, Away From Her and Take This Waltz, were accomplished, but her latest is her best yet. It's a documentary about her family, and it's real gem -- even if you know the real story, which I highly recommend avoiding before seeing this film. I wrote about Stories We Tell for Deadspin.