I have to agree as well about the kiss! It still gets me everytime, I mean, I catch myself starting to breathe heavy and get all swoony! I think it gets worse each time I watch it!
This part isn't really different than the book, but just more visual for me. When Bella walks into Biology class and Edward gets a wiff of her, his reaction in the movie is so great to watch. Mind you, I saw the movie first, so it took me a minute to understand. I kept waiting for him to barf! I just love to watch his face, then when he covers his nose and mouth, I giggle everytime! Then, Bella's face in reaction, love it!