By skyforbes Was prompted by a smosh games video to think of what I would define a 5/10 movie to be. In my mind it's a movie you didn't openly dislike but it left no impression. I know ratings like this are subjective and my 5/10 could be your 9/10.
My mind goes to Elysium. Conceptually I really like a good SciFi movie but the overall execution and story were forgettable. A good concept that petered out.
Another one is The Marvels. Didn't hate it. Wasn't wowed by it. Don't remember much of it.