While Fable is pretty good, Final Fantasy kicks Fable's ***. The story lines of any one of the final fantasy games is better than fable's. I've played the first 10 of them (except FF9), and to be honest, I would choose any of them over fable, any day.
Yeah, sure, you don't get the choice to be good or evil, and the whole thing is less choice-oriented, but the gameplay is far more interesting. Oh, and those of you who are complaining about the turn-based fighting system, FF has had a few that were real-time, but I can honestly say that I'd rather have turn-based, because the enemies actually have more of a chance of winning than they do if you run up from behind and hack away at them, so it provides more of a challenge.