i fully expected to hate this movie and i highly doubt i would've even bothered to watch it were it not showing on my flight. so i suppose you have to take some of my positive impressions with a grain of salt, since i tend to have irrationally exuberant feelings about any movie watched on a plane. except the pianist--don't ever watch a movie about the holocaust before a vacation. it's a downer.
(500) days of summer begins with a despondent joseph gordon-levitt (aka that kid from 3rd rock from the sun), lamenting to his friends about the demise of his relationship with zooey deschanel. not exactly a spoiler to disclose that, i don't think. then the movie backtracks to follow--rather jaggedly--the arc of their relationship. i enjoyed this movie--it was light, very entertaining and just clever/gimmicky enough. the "falling in love" montage was one of the better i've seen in, urgh, a romantic comedy. the movie does justice to the absurd highs and equally ridonculous lows of infatuation and the mental shuffle we all engage in postmortem.
a few reviewers complained about how thinly drawn zooey deschanel's character was and how she barely seemed worthy of all this devotion. but isn't that always the case in movies? like who knows why lloyd dobler was so obsessed with diane court, aside from the fact that she's the valedictorian "trapped in the body of a game show hostess?" she didn't have much of a personality, as far as anyone could tell. i didn't know anyone like diane court, but i definitely knew girls like summer--irrepressibly cute, looks good in wide-legged and high-waisted pants (a lethal combo for most anyone over 100 lbs), just hot enough to draw guys in and just cold enough to keep them wanting more, emotionally detached, inscrutable, etc. in other words, every emaciated hipster dude's dream girl.
in summary, if this movie happens to be offered on your flight somewhere and you have 90 minutes to kill (which you presumably do if you're flying), i recommend you watch it. you won't regret it!
[will try to post a photo laterz...]