1. He's Malcolm F---ing Tucker
He's been working in film, television, and theater since before I was born, so he's got quite a CV. He's even appeared on Doctor Who before (twice, if you count Torchwood). But he's arguably best known for his work on The Thick of It, as the foul-mouthed Malcolm Tucker. When you watch this show and imagine it without all the cursing and disturbing sexual imagery, you can see his mile-a-minute diatribes easily translating into a darker, perhaps less personable Doctor. This line alone was what sold me on Capaldi as the Doctor. (Excuse the profanity.) "Well, half an hour you were in with a shot. This is half an hour hence! We've f---ing time travelled, yes? We're in a weird and wonderful world where everything is different! Maybe, outside, the polar ice caps have melted, maybe there's f---ing robots knocking about and Davina McCall's the new pope. Maybe you can download rice! I want you, right now, to think about your future, OK? Think about what you are doing! Get yourself back on the train to f---ing Tomsville, yeah?" This is the Doctor Who that I want to be watching right now.