Tolkien described him as "sea-green incorruptible" and, if you consider everything this poor guy has to put up with, it's a wonder he can even keep it together.
Under his father's maddening iron rule, Faramir remains devoted to Gondor as its noblest captain, humbly obeying Denethor's every command despite all.
While spying on Mordor in a secret waterfall hideout, Faramir encounters Frodo and Sam on their way to Mount Doom and, using the shrewd perceptions he inherited from his father, he figures out Frodo's secret mission to destroy the One Ring.
Unlike Boromir, though, Faramir doesn't want anything to do with the ring, and lets Frodo continue with his quest, much to the anger of Denethor (who's already jealous of Faramir's embracing of Gandalf as more of a father figure).
Later, after being wounded by Southrons during the Siege of Gondor, an unconscious Faramir is nearly set on fire when Denethor becomes suicidal. Faramir's rescued by Gandalf (with Pippin's help!), but Denethor manages to kill himself.
After ALL of this, Faramir finally meets Éowyn, and instead of telling her to buzz off in light of his own problems, he is nothing short of magnanimous.
For his loyalty to Gondor in its darkest hours, Faramir is given the land of Ithilien, which he lives in with Éowyn in LotR's best example of "happily ever after."