I guess I should turn in my SP card... While I didn't conform to a 9-5 job, I do work a 7-4 job... And I am not a morning person at all. So I think that classifies me as conforming to the norm... But, you gotta do what you gotta do. If I get laid off I'm screwed, I don't know anything about drugs or the mafia.
I'm quite certain the Holmes was a sensor indeed (or would be if he were real), but he seems to use it mainly in an extroverted way with his constant awareness of his environment and many other things I can't name as I haven't read any stories in a while. I'm quite sure he was ISTP, but Doyle based him on two of his friends/acquaintances (if I remember correctly), so he would probably carry traits from people with different types.
I read that book, too, and I agree with @Lark that Holmes is indeed an ISTJ. In fact, that entire character type (which shows up in pretty much every noir film) is basically an ISTJ.
And anyway, your interpretation of Se and Si seems to be wrong even on a stereotypical level. Se is movement...it's kinesthetic (more being in tune with ones' surroundings), while Si is detailed, perfect for dealing with minutiae (i.e., perfect for academics, being a detective, being in control of ones' surroundings.)