Now that I'm thinking about it, my only real gripe with Fellowship of the Rings was how they never alluded to how old Bilbo was, and how much time had passed between the night Bilbo disappeared and when Gandalf came back and told him he had to leave Hobbiton. In the movie, it seemed to have happened practically overnight!
Oh well, though, I won't complain TOO much. I really do think the entire trilogy is a masterpiece!