Personally I think LOTR has a weak ending... Even thought it reading the book.
(spoiler thoughts)
Aragorn should have gotten to the cave just after Frodo, and held the ring over the flames while Gollum and Frodo fought, debating with himself, then finally dropping it in. Everything else could have been exactly the same, just with a more satifactory "Aragorn isn't like his fore-fathers" payoff.