Let's see if I can re-rail this thread. I picked Star Wars, but I'm going to comment on all of said movies.
Star Wars - First off, I'm going to assume we're excluding the prequals, as it should be. The original Star Wars trilogy was one of the greatest epics ever told, and while it did have some definite 'kiddish' moments, I'd put it up on a pedestal with Lord of the Rings, Narnia, and even the epics of Homer (though not as high as some on that same pedestal). It told a great story, with great acting and never leaves the audience guessing the mood (thank you, John Williams). I still get chills when I hear Darth Vader tell Luke what really happened to his father.
Godfather - I must admit, I haven't seen any of these movies all the way through, or any of the third one, so my ability to comment is limited. What I did see, though, I liked.
Pirates of the Caribbean - A good epic, but not as great as it aimed for (one of those shoot for the moon and at least land among the stars moments). It tries too hard to be Star Wars at sea, and while it followed the formula of standalone first movie, dark middle movie, and epic closer, nobody has yet to pull off a proper ending for their equivalent of Empire or a sufficiently believable counterpart to Jedi.
Star Trek - Good sci-fi saga, with 4 good series and about 5 or so good movies. I still don't rank it top dog, but it's definitely enjoyable and has lasted a long time.
Indiana Jones - Probably my second choice. It reeks of 30s/40s pulp comic in the same way Star Wars reeks of Flash Gordon and Buck Rogers serials, but like Star Wars, it pulls it off, and while The Temple of Doom is probably my least favorite of the three, it still pulls it off, and the other two, by featuring actual, Biblical artifacts, bring quite an epic feel to it.
Alien - The first one was a good horror flick in a sci-fi setting. The second pretty much set the standard for how sci-fi space marines should act when dealing with nasty aliens (though I'm sure they were inspired by the Starship Troopers books). The third was still cool. The fourth one was kind of a flop. They should have left well enough alone.
Lord of the Rings - Greatest fantasy epic ever. I would have voted for it, but I'm assuming we're just talking about the movies, and while LotR is good, the movies themselves will never be my favorites because they are still overshadowed by the books, whereas movies like Star Wars, and Indiana Jones were designed to be movies (wasn't The Godfather also based on a book?).
Harry Potter - Very good. The books were very well written. However, the movies suffer the same thing that Lord of the Rings does.
Anyway, that's my opinion.
"Lighght"
- This 'poem' was bought and paid for with $2,250 of YOUR money.
Name one thing the government does better than the private sector and I'll show you something that requires the use of force to accomplish.