Director David Fincher has a reputation for being a cranky person to work with. However, Aaron Sorkin is here to convince you otherwise. In the December issue of Vanity Fair, the Oscar-winning screenwriter wrote an essay on Fincher, calling him "warm, honest, and an exceptionally generous collaborator." However, the piece doesn't exactly start off that way. In fact, the first paragraph has Sorkin essentially calling the 'Social Network' director emotionless.