This one isnt traditionally endearing, but for the Doctor its a wonderful encapsulation of his nature. You see, if the Doctor were in Star Wars he would be Han Solo, not Luke Skywalker. Hes a scoundrel, not a white knight. Sometimes he plays the part of the knight so much that people forget about that. And some writers dont get it. But Gaiman knows that the Doctors a scoundrel in his hearts. Seeing the Doctor struggle with the cyberplanner all episode is rough. Theres a real risk that something bad could happen, and the Doctor wouldnt be able to stop it. So seeing his victory, watching him taunt the bad guy, is, dare I say, heartwarming. How does the Doctor defeat the cyberplanner? He cheats.