12 being distant: 'I don't ever want to get emotionally compromised ever' distant, 'sociopath' distant, or 'asshole' distant? -If you've got a good idea of what you want the Doctor's new personality to be like, think you could write a prose blurb about how you see him, and we can go from there?
I see Twelve as someone whose years have finally caught up with him. Despite his comparatively youthful appearance, he doesn’t have the childish factor that so defined his past two incarnations.
He’s nearly reached his emotional tipping point, and he grows less and less forgiving of his enemies up until the finale, which is a ruthless climax for him as a character. Dangerously dark on occasion, he poses a risk to himself and his companions with his headstrong, generally compasion-less attitude.
That being said, he isn’t all gloomy; in fact, because of his overall personality, the moments when he finds beauty in the universe are the ones that speak the most about the wonder that still define his character after a thousand years of traveling.