There are some really interesting things you find on the message boards:
- I once came across a nomadic TV watching club - they'd decide to watch a classic TV series, and then go to the board for that series to hold weekly discussions (you go in one week and see them discussing the first episode, then go in the next week and see them discussing the second, etc.). When the series was finished, they'd announce the next series they would watch and migrate to that board.
- At one point the board for Kingdom of Heaven was a bunch of history buffs discussion history (and occasionally mentioning the movie).
- Coming across threads that had been going on for over a decade was always interesting. Someone made a comment, a year or two later (long after they've left) someone else comes along and responds to them, a couple years later someone else responds to that, etc.
- The discussion of movie finances could be really informative, and definitely gave me a much deeper understanding of how things work and what it means for a movie to be profitable (basically, it's really complicated).
And of course, the boards were a great place for things like recommendations, up to date news, and learning about things you missed in the film.