I'd like Capaldi in a big long dark coat! A long gothic one. Maybe with aturned up collar. You know, a bit like something Dracula would wear. For the rest of the costume, I'd lke it to resemble McGann, the Shalka Doctor, and the Hurt doctor. I cooked this up a while back, but in hindsight, I'd prefer him with silver buttons instead and I wish I did the collar better. And maybe give him boots instead of shoes. Black versions of the boots Tom Baker wore in his last series.