Love a bit of Sandler and whilst Johnstone isn't the best actor to grace the screen I always tend to enjoy his films.Sandler's done enough decent acting to cover up the awful stuff enough to get him off the bottom of the list.
Now, with the exception of maybe Pain & Gain, I don't think I've ever found myself saying, 'Boy, that Dwayne Johnson can act!'
Its all about you're expectations. If I see a film is starring the likes of Stallone, willis, Statham etc then I'm not expecting an award winning performance but a couple of hours of mindless action that entertains me.