I'm very interested at more of your thoughts on the "light and dark", although if you haven't read the end of the series, I suppose it'll be limited. Because in my mind, JKR missed a really good opportunity by sticking to her "Gryffindor good, Slytherin bad" thing rather than showing that there are shades of grey in-between. (Although, I guess, with Peter Pettigrew in Gryffindor, there's at least an example... I guess I would have liked to see at least one USEFUL Slytherin.)