Award Snub: No Best Original Screenplay nomination?
Better on DVD: The brilliant use of Anachronic Order can be more easily appreciated if you can rewind and rewatch scenes and transitions.
Non Sequitur Scene: The spontaneous dance sequence (the morning after Tom and Summer have sex for the first time), which is simultaneously a glorious movie musical dance scene and a hilarious parody of movie musical dance scenes.
Bittersweet Ending: Tom and Summer don't get back together, but he's on the path to achieving his dreams, she's in a happy relationship, and he might have a good relationship starting.
Or, Downer Ending: Some viewers have been saddened, or even angered, by the reveal of Autumn. "HE LEARNED NOTHING! He's just going to do it all over again!"
Or, a Here We Go Again, but for Autumn, who'll have a 500 day relationship with Tom, who is too emotionally wrecked from what happened with Summer, and it'll cause their relationship to collapse eventually.
Fan Dumb: Zooey Deschanel was quite taken aback by the volume and vitriol of the hate mail she received in response to "her" alleged mistreatment of Tom.