The movies did Faramir dirty.
In the books, he immediately rejects the temptation of the ring after Frodo tells him of Boromir's temptation, saying that a thing of the dark lord should not be used - thus proving how much stronger and wiser he was than his brother.
Faramir is one of my favorite characters in the books - a black sheep that represents hope for humanity after a book and a half of being shown humanity's failures. And he's such a badass in RotK
Peter Jackson weakened his character because of pacing and because he didn't understand that stories need occasional bright spots of hope and it's of the greatest sins of the movies IMO. Which is even more rediculous when you realize that Tolkien based the character on himself.