I don't like suppliments in general, and never buy setting books. If anything, I'd buy a setting book that was a collection of settings that I could use in different games, just a short synopsis of each and what makes it different. Long lists of cities with unpronouncable names that are all pretty much 'generic medieval city' and new classes and such don't really hold any interest.
But I'm not really in WotC's target market either.
But I'm not really in WotC's target market either.