This one is nothing major, and I'm only mentioning it because it was in an AO of all things, but I'd like
more scenes like this one with Conan/Shinichi and the puppy. Even though it's not canon, this was one of the most major times that Conan/Shinichi actually felt human IMO. Usually he's the snarky guy that knows everything, but this scene really convinced me that he's more than that. Just by petting a puppy!

Really, just that half-hearted smile Conan gives before bending down is probably the most human his character has been for me....in an AO! Come on Gosho, do something like that!
EDIT: Oh yeah, just remembered another one.
CONAN IN THE PANDA PAJAMAS. YOU CAN'T INTRODUCE THAT CONCEPT WITHOUT EVENTUALLY PULLING THROUGH, GOSHO. ESPECIALLY SINCE RAN COULD TOTES "CONVINCE" HIM.