6. Darkness
...But not only has Eleven been the most childish, he's also been one of the darkest. Russell T Davies had the idea of the Doctor being a lonely god who longed to be human, which made sense, as despite his faults, he wrote sadness perhaps more beautifully than any other writer in the history of Who. Steven Moffat though, seems to see the Doctor as a man who runs away from his dangerous past, someone who'd go crazy with grief and guilt if it wasn't for the light-hearted front and a mystery to solve. Which also makes sense, given that he's provided some of the scariest villains and most surprising twists in Who. But whether it's in a glare, or shouting at Colonel Manton (A Good Man Goes To War), Matt Smith has towed the line perfectly between the madman in the box and the mad alien with blood on his hands, and it's as much thanks to the subtlety of his acting as it is fantastic episodes such as Amy's Choice and The Girl Who Waited that have placed Eleven squarely as the villain of the piece. Sometimes, Matt's Doctor is as dangerous as he is lovely, and that's what he should be: fire, ice, the heart of the storm, and wonderful.