So a small note as I continue to annotate STUD (I'm so slow LOL motivation is hard to come by in this world)...
Holmes states when in the cab coming back from Lauriston Gardens, "I'm not going to tell you much more of the case, Doctor. You know a conjurer gets no credit when once he has explained his trick; and if I show you too much of my method working, you will come to the conclusion that I am a very ordinary individual after all."
THIS is fascinating to me (and I know that somewhere on this website, I've seen someone else say something around this gist), because Holmes clearly doesn't want Watson to think less of him. He wants the man to be intrigued enough to be kept around, and whether or not that involves keeping his methods a secret, never mentioning what he does for a living (until Watson asked, of course), and changing his habits to better suit a more "ordinary" man like Watson, he'll do it. He wants Watson to think he's brilliant (and he is, of course), but he's scared that if he reveals how he thinks, he'll just be a boring man that Watson won't want to hang out with.
He also wants to impress him, let's be honest.
This is something that, in Granada, is touched upon at least twice in small, roundabout ways. In two separate times, Holmes explains his deductions to a client (Red-Headed League is the best example I can think of), to which they reply "I'd thought you'd done something clever there". They immediately disregard the brilliance of the deductions because they were "elementary" (if I may say, LOL) and easy to follow once explained.
Watson never did that. Watson immediately replies to Holmes with, "I shall never do that...you have brought deduction as near an exact science as it ever will be brought in this world." He's impressed and he understands the brilliance behind it; he doesn't immediately shut Holmes' deductions down because they were explained. It's why Holmes almost never seems to have an issue keeping deduction explanations from Watson again (that's not to say that he doesn't keep them back because he prefers not to explain during cases-that's just how he is). He goes on to immediately tell him something else about the case/deductions.
And, personally, I think that's really cool. (why did I say a small note LOL)

















