For example, I want to know if a movie has a happy ending, even at the risk of ruining the surprise. Is the arc of happiness something that starts high, dips for dramatic impact then ends on a high note? Or does it start high and just keep dropping until the movie ends and you want to swallow a bottle of sleeping pills? So I recommend an arc description, such as this example:
Arc: High – Low – High
Next, I need to know the mumbling quotient. How many times do you have to turn to the person next to you and ask “What did he say?”
Mumbling Quotient: 7
And how long is this movie? Can my bladder make it all the way or is this a two-pisser?
I have a hard time with any movie with a plot so complicated I can’t understand it. I have a right to know ahead of time whether I will be able to decipher the story I am paying to see.
Given how loud movies are these days I don't generally worrying about mumbling (even with my hearing as bad as my wife says it is) but I certainly would like to know how much of my soda it is advisable to drink before the movie even begins. Also, I would add in a category for movie adaptations of books that would tell you how much the movie deviates from the storyline of the book, but that might be a personal quirk.