I remember going to see this movie with almost no concept of what I was about to see, and as soon as the movie started, I knew I was going to love it. Not only because of the epigrams at the beginning, but the moment Carlin showed onscreen as Cardinal Glick.
I have to say, I love Kevin Smith, and have watched and enjoyed most of his films as I write this. But this is far and away his best film. And I do think that part of that is because he had to fight for it. Both in casting and in the arguments of blasphemy against it. He just made this work.
As the penultimate fanboy, he made sure to mix in his usual random pop-culture references (Sherman, Illinois, anyone?) along with the religious (and still sometimes pop-culture) references. While I dont agree with every statement made in this film, I will say that he presents it with such humor that even someone as athiest as I can enjoy the religion in this film.
I do hope that someday someone manages to get Good Omens past the prelimnary stages, and actually gets it filmed, as it would make the perfect double-feature with this film.