In an instant he had whisked out a revolver from his breast and had fired two shots. I felt a sudden hot sear as if a red-hot iron had been pressed to my thigh. There was a crash as Holmes's pistol came down on the man's head. I had a vision of him sprawling upon the floor with blood running down his face while Holmes rummaged him for weapons. Then my friend's wiry arms were round me, and he was leading me to a chair.
"You're not hurt, Watson? For God's sake, say that you are not hurt!"
It was worth a wound -- it was worth many wounds -- to know the depth of loyalty and love which lay behind that cold mask. The clear, hard eyes were dimmed for a moment, and the firm lips were shaking. For the one and only time I caught a glimpse of a great heart as well as of a great brain. All my years of humble but single-minded service culminated in that moment of revelation.
"It's nothing, Holmes. It's a mere scratch."
He had ripped up my trousers with his pocket-knife.
"You are right," he cried with an immense sigh of relief. "It is quite superficial." His face set like flint as he glared at our prisoner, who was sitting up with a dazed face. "By the Lord, it is as well for you. If you had killed Watson, you would not have got out of this room alive. Now, sir, what have you to say for yourself?" (from "The Adventure of Three Garridebs")
Whatever you make of the precise nature of their love (and I think there's a wide range of valid readings), I suspect you'd have to be more cold-hearted than even Moriarty could manage not to be moved by this kind of affection. Happy Valentine's Day.
P.S. - Amy Thomas has an interesting analysis of "The Sign of Three," specifically against the charge that the Sherlock of that episode was too sentimental for the canonical (meaning Doyle) character. It's really very well done and gives an interesting argument that sSherlock might be more driven by emotion than we sometimes think.
P.P.S. - On the TARDIS thing, after one too many Christmases in London, the Doctor has decided it's best not to mark Earth holidays so he's decided to leave that to Captain Jack. Still, we all know he's a big romantic at heart.