The Doctor treats every crisis like a game, some grand adventure with mysteries and puzzles to be solved, the main prize being survival. The more perilous the situation, the more he seems to come alive, enthusiastically pitting his wits against his opponents in a battle of intellect. He uses every sneaky, underhanded trick in the book to outwit sometimes vastly superior numbers, and he seldom needs to resort to force.
That’s fortunate, because when the Doctor stops playing games and gets angry… Watch out!
There’s a reason he’s referred to in some parts of the universe as the Oncoming Storm.