I like movies that I don't understand 100% on first viewing - movies that require a bit of analysis and don't necessarily provide you with all the answers but leave it to you to form your own opinions about.
The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents. ... The piecing together of dissociated knowledge will open up such terrifying vistas of reality, and of our frightful position therein, that we shall either go mad from the revelation or flee from the light into the peace and safety of a new dark age.
~ Howard Phillips Lovecraft