All right, so. Sherlock is pretty famous for his deductive abilities, which basically means he can tell you a bunch of things about something at a glance. The problem is, he often tries this out on other people, as John Watson and Henry Knight, among others, can attest to. Very rarely do people manage to throw him off, though that honor can go to Jim Moriarty, who's a damn good actor, and Irene Adler, who first met him naked. But that's another story, so.

This post is, basically, so you can tl;dr on your character's habits, clothes, posture, career, scars, tics, measurements...yeah. Basically, lots of little things most people don't notice from your character. Hey, I'm not as perceptive as Sherlock, and I'm lazier. Dump anything you might think he'd notice and deduce from a few glances at your character, which is a lot, mind.

Also I think I'm done here.