I think using a standard format for answers to this type of questions would be a good idea.
I propose using
Year: Title by A. Author / by D. Director / featuring A. Actor
Explanation what it is and why it fits.
I don't think a leader board is a good idea, though, since it's not a competition. It's up to the querant to decide what the best answer is.
What you're asking for is pretty much implemented by the new SE-wide feature of being able to "follow" posts as well as bookmark them:
The Follow Questions and Answers feature is now live across the Network
If you've clicked "follow" on a post, then you will get a little red inbox notification for every new interaction (comment, edit, etc....