Ah, see, I think I'm missing the "fanfic" gene - I'm not very interested in it at all. My reactions only come to from the characters in the books themselves. Within them, what I love are those glimpses or characters when they're not dealing directly with Harry, which show just how limited Harry's/our understanding is - Lucius in Borgin & Burke's, Snape's reaction to Ginny being taken into the Chamber, etc. I think my favourite scene in all of the books is in PoA when Snape confiscates the map - the conversation he has with Lupin has a whole other world within it.