Him saying this makes me embarrassingly happy
"I could play Doctor Strange maybe. I could grow I nice little '70s tash. And do little, he has little gray bits there, gray temples. And I could talk about the Orb of Agamotto or whatever it was that he used to have. I'd look quite good in a cape. I don't know, I have no particular..." --David Tennant in an interview for Under the Radar here
I'm not even really that much of a Doctor Strange fan (give me Spider-Man, Deadpool, or the FF any day over that), but the fact that he knows enough about the series to reference the Orb of Agamotto off the top of his head actually makes me giddy.