Just a great outfit.

Here's an image of the whole Doctor Who outfit, as done by David Tennant, and I must say, it's just a great outfit. The coat matches his hair at times, and compliments the suit colors very nicely, matching intensity. The loosened, reddish tie is a good compliment both to his scottish complexion, and his very cool shoes, which, if I'm right, are the classic Converse Chuck Taylors. His pants (ahem, trousers) have just enough break to look young without looking sloppy, and everything is along somewhat slim lines. The loosened tie, as a side note is a classic signal of playful rebellion.