1. The Dark Human
One thing we took away from The Last of the Time Lords is that the human race are the greatest monsters of them all. They're both the worst and best. And they're still the Doctor's favourite. His entire appearance, which could be anything according to him, is always modelled around humans. So if the Doctor was to go dark, and I don't just mean moody or angry, I mean Valeyard dark. Oncoming Storm dark. The Beast dark. If the Doctor was to go dark, then it would only make sense for him to be more human than ever - either in reflection of his love of humans, or in an attempt to try and stop his dark alien side from taking over, holding onto hope. The beard would be a nice touch too since John Hurt's apparently terrible Doctor also donned a beard. His entire look then would be a perfect summary of who he had become - an old, ragged, dark man. But what do I know about dressing the Doctor?! About as much as any of you! I could be completely on the ball with one of these outfits. Or completely off it. And the latter is more likely. What do you think Capaldi's Doctor will dress in? And how would you like him to dress?