Oh, one more thing about Snape. We're sitting here thinking that obviously Snape is evil because he killed Dumbledore when about one chapter earlier Harry did almost the same thing by force-feeding him that potion- doesn't that seem a bit coincidental? If the potion had killed Dumbledore we'd have forgiven Harry because Dumbledore knew it was for the best and asked Harry to do it. Now we know Dumbledor asked Snape to do something for him but we don't know what it was. It seems to me Harry was not the only one following difficult orders.