A friend just sent me this on chat.
Here’s another thing I love about John Watson: he’s not intimidated by Mycroft. Oh, he might have been at bit when they first met, being all mysterious and moving cameras and sending along dark sedans, but John’s not an easily frightened or intimidated man and even by the end of that first conversation his hands were steady. Mycroft is an incredibly powerful man, and even though we’re never quite sure his exact position within the government, it is quite clear that he is a man whose position and power is to be respected and possibly [probably?] feared. But after that initial meeting, John is never truly intimidated. He doesn’t really care who or what Mycroft is.
To John, Mycroft is not The British Government, he is His Best Friend’s Brother. Can you imagine anyone else scolding Mycroft in Buckingham Palace (“Boys, please, not here”) or striding into the Diogenes Club to point out his failures as a brother (“You blabbed about his entire life to this maniac… This is what you were trying to tell me, isn’t it? ‘Watch his back ‘cause I’ve made a mistake.’”)? Mycroft probably doesn’t get a lot of people lying to his face (about Sherlock looking for the Bruce-Partington Plans) or being really sarcastic (“Yeah, thanks for that,” John says, after Mycroft didn’t warn them about the Americans at Irene’s place).
It makes me wonder what Mycroft thinks of John; obviously he finds him trustworthy, given the kind of sensitive information he shares at times, but how does he really see John? Does he see him as Sherlock sees him, as important and loyal, or does he sit up nights wondering how this military doctor of no remarkable intelligence (compared to the Holmeses) manages not only to keep up with Sherlock, but has become so valued by Sherlock in a way no one else ever has?