My feelings about AMC's plans for their Preacher series are extremely mixed!
Just like the potential Sandman and Hellblazer adaptations that have been batted about for quite some time now: I would love to see a Preacher adaptation that stays true to the source material, or at least its spirit! With Preacher in particular, I don't want to see an adaptation that pulls the dark, satirical, violent, sacrilegious, and controversial punches of the source material! I don't want Preacher Lite!
Although Preacher is loaded with comedic elements, it's a dark satire that I personally think is outside of Rogan's and Goldberg's sophomoric, stoner comedy wheelhouse. (And I, for one, absolutely hated the atrocious This is the End--the closest script to Preacher that they've written thus far!) I would much prefer a more suitable writing team, preferably including Garth Ennis!
As for choice of AMC... I would have preferred HBO or ShowTime. (In particular, given True Blood and Game of Thrones: HBO has demonstrated that it's perfectly suited to Preacher.) However, even though the freedom from censorship is less than it would be under HBO or ShowTime: I can see AMC working. First of all, The Walking Dead demonstrates that AMC has no qualms about graphic violence in its series! (Even though the horror films it airs are severely edited!) Moreover, there's no real need for full frontal nudity or explicit sex scenes in Preacher. However, how far could a Preacher goes in terms for its dark, satirical, sacrilegious, sexual, mature content on AMC? Even though Breaking Bad was demonstrated that AMC can handle dark, satirical, mature material: We are still talking about a network that cuts out the f-bomb from its airings!