And when Molly tried to imply he only cared about John's opinions/concerns he quickly let her know she always counted too. So all we've really learned from this is, when pressed, he will be considerate of peoples emotions.
Oh my gosh! I knew they were setting it up! Also on "A sign of Three" Sherlock says that if he were to kill John it would be by poison because he has effectively managed to slip many things into his drinks for experiments! It is cannon!
He is like the perfect combination of the two of them. In my opinion, he got his fathers face and his mothers lips and eyes and nose<--- he has more of his fathers lips and nose. But he DEFENENTLY has his mothers eyes.