One quick word on the Mouth of Sauron:
He was the first thing to creep me out in those films, so he was absolutely perfect in my mind. Maybe I'm just not a perfectionist when it comes to movies, but...
Also, the House of Healings scene between Faramir and Eowyn was almost exactly as I imagined it, though it was quite quite short...
And I think we can all agree that the movie wasn't anywhere near long enough...