If you could change one thing in the first film, what would it be?
I've always been a bit disappointed that my favorite ghost never made the cut for the film. Peeves was such an important part of the entire series, but unfortunately he never made the silver screen. If he were involved in the movies, we would've seen him picking on first years, causing a trouble, and overall scaring the socks off of Harry and his friends.
Another thing that I am upset about not making the film, are Snape's potions. We all know that before Harry can get to the Stone, the golden trio must pass through these protective tasks. This is the part in the book where we all begin to question whether Hermione is supposed to be a Gryffindor at all. Instead of solving the riddle, Hermione stays behind to tend to an injured Ron, and Harry moves forward to face Quirrell.
One more thing! The Sorting Hat song! The Sorting Hat sings three songs throughout the series, but his song never made any of the films. You can read all three Sorting Hat songs here.
I know that is more than one thing, but I couldn't help myself!