I read a lot of novels. I watch a lot of films. Sometimes I watch films based on novels (though never the other way around), and one thing I've learned is not to make the mistake of comparing a film to the novel it's based on. They are different media used by different artists and require different techniques. Sometimes what works on the page simply won't work on screen. This is why it's OK that Bladerunner's characters act differently from those in Philip K. Dick's novel, that Dr Strangelove is a comedy, and that The Hobbit is stretched across three really, really long movies1.