Professor Sinistra teaches Astrology. She is mentioned in the books but never identified in the movies.

I am glad Peeves is not included in any of the movies. What a nuisance!

We've only seen 2 common rooms so far--Gryffindor and Slytherin. I'd like to see Ravenclaw's common room and Hufflepuff's common room as well.

Well that's my 2 cents for what it's worth.