Twitter Pitch: Take another book from author of The Notebook, get dude from G.I. Joe and girl from Big Love. And make sure there's a rainy kiss scene.
Rewatchability: Almost zero. I have never understood the appeal of re-watching a love story. The best parts of the movie come from the unknown twists in the relationship, if you know how the characters' lives are going to progress how do you enjoy it. Action movies have impressive explosions, comedies have jokes, thrillers have parts you might miss. Dear John is like any other story in its genre, it's a fine movie but it moves slowly and has nothing I would want to see again.
Time Limit: I looked at my watch around the 1:30 mark. No problem with the length, although there were a couple of montages which basically served the same purpose. The final time clocks in right under two hours and could have been more tightly done in 1:45-1:50.
When to Watch: The best time to watch Dear John would be on a rainy day with your boy/girlfriend. You will not leave this film with a wonderful feeling so make sure you are either with a friend (if you are a girl) or with your partner.
When NOT to Watch: If you are a girl and your boyfriend is leaving for the military soon or you are in a relationship with someone in the military, don't watch the movie. Screw it, don't watch this if you are in any long distance relationship.