Yeah, I loved Animal Man, especially toward the end of his run when he cropped up as a character controlling everything from behind the scenes (I have it as a graphic novel but haven't read it in a while).

You're right, Ennis hasn't really written anything as good as Preacher since. Maybe that was his "idea, of a lifetime" but he is still a great stylist and when you read a Garth Ennis comic you know he wrote it (without looking at the credits).