To be honest the character I miss the most in the movie is Aragorn. When I first saw the movies (and ten times after that) I thought that he was gorgeous character but now that I've read the books, his movie portrayal feels so shallow and generic to me...

May be a little bit OT but I also hated how the undead army just saved the city instead of Men taking it back themselves. It's not like the army wasn't important in the books but they totally overpowered them and gave them way bigger role than they were supposed to have. It kind of kills the gravity of the situation.