-- Morrie Schwartz
The titular Jon is like a character off The Jersey Shore that we can actually root for. There's depth behind his gym rat physique that I'm not sure JGL meant to portray early in the movie. His addiction to pornography has left him with a shallow view of women, openly bragging about his streak of bringing home "dimes". His father, played by a fake-tanned, toned Tony Danza judges his son's potential mates purely based on attractiveness, while his mother just wants him to pair off and give her grandchildren, each in their own way expressing their one-dimensional beliefs about what a relationship provides. Scarlett Johansson plays Jon's love interest, a woman conditioned by romance movies to believe that men will make sacrifices for her and contort themselves to her view of what a man should be without any compromise from her. Jon's two friends play the better and lesser halves of his personality taken to an extreme, with Danny being the womanizing side, in awe of Jon's ability to take home good-looking women, and Bobby, who acts as the audience's voice in many scenes. Brie Larson plays Jon's sister, and though she only stops texting long enough to have one line, it is one of the best in the movie. Julianne Moore is the only one who feels slightly miscast to me, although her part of a pot-smoking MILF comes with the requisite waterworks for always-a-fan-of-crying Moore. I can't help but wonder what Michelle Pfeiffer would have done with the character.
The best movies are the ones that ask interesting questions that they don't fully intend to answer. Beyond all the larger, overarching questions Don Jon leaves you with, the simplest and final is, "Was that a happy ending?"