If I were forced to choose right this minute, I think Matt Smith would win. There's just something about him that makes me a) laugh and b) feel very safe, which is the perfect combination for the Doctor. I also find him compellingly attractive, which doesn't hurt.

And his intro is incredible. I just re-watched it last night. So much fun.

The music in Vincent and the Doctor is so perfectly done, it's another of the things I love about the episode, as well as the fact that my favourite actor - Bill Nighy - plays a role in it. It's the perfect episode.