I thought the yule ball was great. The Patil sisters were both gorgeous. I heard somebody in the theater say "Ron's got the pretty one". I disagree, both were great actresses. Harry's date I think I remembered, had a funny line in there somewhere and she was kinda cute too.
I thought they exaggerated on Hermione's crying on the stairs. But then again, I didnt re-read the book for accuracy this movie. As for the movie on the whole, I cant wait to go see it again.