Favourite alteration from the books in the movies?
Tricky, tricky, tricky...I generally loved the books so much more that I can hardly think of anything they changed I would have liked to be the same in the book. If I had to choose, I would probably take the shrunken heads from the Knight Bus in Harry Potter and the Prisoner of Azkaban. I thought they were quite funny and seemed as if JK Rowling could have invented them. It is only a pity they didn't reappear in any of the sequences...