There are some movies that I wouldn't watch again because I thought they were unbelievably bad, and then there are movies that are too sad for me to ever watch again.

In the first category:
- Valhalla Rising - couldn't decide if it wanted to be an art house movie or a gory action film and failed miserably on both fronts. Wasn't helped by the death metal soundtrack, either.

I'm sure there are others that I've seen that I could add, but that's the one that instantly springs to mind.

In the second category, two that immediately come to mind are:
- Philadelphia - hits too close to home, having had a favorite uncle die of AIDS.
- Grave of the Fireflies - a Japanese animated film about two young orphans set at the end of WW II. Very well done, I highly recommend it, but so incredibly sad that I doubt I could ever watch it again.