I was very sceptical after watching the Passion of the Christ. I'm not an atheist, but I have serious doubts about the way the things were shown in the movie. Everyone agrees that Jesus was a human (Son of God but still a human). I seriously doubt that any human would have lived to carry the cross anywhere after being shreded by whips the way it was shown in the movie.
I was disappointed by the fact that Troy almost completely ignored both, the mythological story and the historical facts. I would have prefered either of these options to the invention of a completely new and partly questionable story.
I too wasn't very fond of Harry Potter III. I'm afraid none of the movies will ever be a worthy match to the books, which is sad as even though movies rarely can become as good as a book, some come very close to it.
I think different about Fahrenheit 9/11, but I don't want to start a political debatte here which belongs to another place.
Another very good movie I watched in 2004 was "Der Untergang". If the title was changed in the English version it would be something like "The downfall". It is a movie about Hitler's last days in the bunker and it managed to combine extreme historical accuracy with an exciting story while keeping out exaggerated musical background which deprives many historical movies of their objectivity.