What makes a movie good?
First off, know that movies create rules. The rules for a James Bond movie are different from a Disney film. The movie lives in a specific environment and you either believe what the movie tells you or you think it's bullshit. And movies can't change the rules in the middle. If a movie changes rules, it's either because the makers got lazy or they just didn't know what they were doing. Now it might be amusing to sit through a Julia Roberts romantic comedy when three minutes before it ends, she rips off her mask a reveals that she's a velociraptor and she uses her claws to rip the other characters to shreds, but it doesn't work as a movie. Because it broke the rules. The movie Scream lays out its rules throughout the film, in case you need an example. So a movie needs to be honest with the audience, otherwise you should complain.

Movies from major producers and directors might generally be thought of as good: lots of big names are supposed to make a movie good, but if you saw Face/Off or Broken Arrow or Mission :Impossible 2, or The Legend of Sleepy Hollow, Star Wars: The Phantom Menace, or God knows, almost any other major studio release that had a trailer that looked really, really cool....

Movies are also good even if they're bad. A bad movie with integrity is better than a good movie that treats you like an idiot. Any movie that substitutes an explosion for plotting or character development should end up in your shit pile.

But don't demand the same rules and responsibilities from each movie: you can't expect Scary Movie (a good movie) to behave like The Little Mermaid (another good movie) or even like Saving Private Ryan (which is a bad movie). A good rule of thumb is that you shouldn't get hugs and kisses in a Tarantino film and you should never see a dildo turn up in a Disney film.