I haven't noticed anyone here mention this yet.
Mr. John Nettleship, the teacher whom JK Rowling disliked so much, upon whom she based Professor Severus Snape, died of cancer this month.
I'd just like to thank Mr. Nettleship for doing whatever he did to make our Potions Master possible. He's given me more joy than tongue can tell.
Lots of debating on the above two pages. The page below are old interviews with Mr. Nettleship.