I never played Fable, played to 880/1000 on a borrowed copy of Fable II, had -no- desire to go Gargoyle, Gesture, and Book hunting or whatever the hell it was I am still lacking. It was fun, I played it until it was on the border of becoming non-fun, and I actually liked coming back to town, seeing my bawdy wife and plucky kids. I think my undead girlfriend even popped out a kid before I was done.
It's a quality game, but I don't see it as being /that/ much more impressive than any other 3rd person action RPG, and Molyneux's promises are never kept, so I am hard-pressed to work up much steam about a game that will not have whatever M. announces, and won't be here for a dog's age anyway.