Oh my god, this is so incredibly funny. And so very in character, too. I love this. I agree with almost everything except Sherlock being in Ravenclaw. I am fairly convinced he would be Slytherin but yeah, Ravenclaw is one of the houses that would fit him best. I mean, I like the idea of both him and Moriarty being in Slytherin, to show that there are different types of Slytherins, and he is "on the side of the angels but not one of them" like someone else said.
Great work anyway, you're certainly very inventive. XD Hermione would hate Sherlock, right? Someone smarter than her who didn't need books to find out stuff and knew personal information about her without even talking to her …
I laughed my head off at Mrs. hudson's Not your House Elf bit, and I LOVED the Hound of the Forbidden Wing part. Awesome, I wish season three would hurry up already!! I would definitely see Irene Adler as a Slytherin, she is certainly ambitious, and I could totally see Sherlock telling the hat that it was boring him, this is brilliant KUDOS to you! Someone should write a Fanfiction of Sherlock in Hogwarts, but I'm sure it's been done ... I love how you draw John, too.
Wow I laughed so hard when Sherlock deducted Lupin and Dumbledore. xP Fantastic art! They were really in character, and it makes me nerd out when you crossed over scenes from Sherlock BBC. Brilliant work!