IMO the biggest thing Fable has going for it is the combat system. It is easy enough to learn and is really fun to mess around with all the spells and weapons.
The biggest problem Fable has is the lack of serious challange. They need to add more bosses. More difficult normal enemies. More puzzles. More difficult quests.
Also I think Fable's loot system needs a complete overhaul. While it is really nice for people who might not be hardcore rpg nuts, it is just not deep enough for big fans of the genre. They need to add in equipment with varying stats, wider variety of enchantments, armors, etc and make the game hard enough so that you need to worry about your equipment maybe not being good enough for the upcoming boss fight.







