I'm glad to hear there's a hell of lot to do outside of the main quest -- which something the original sort of lacked. There was just not a great amount of side-questing in the original Fable (from the guild straight-up). Did they add lots of side-quests in Fable 2? Or did they just really expand the hell out of the mini-game stuff for Fable 2? Or both?
Though, there was a nice amount of mini-game sort of stuff in Fable: TLC -- card games, emoting so you can try to woo the ladies, buying a house to upgrade, etc etc. I just wish it had more of the usual sort of side-quests.
At around spending 20 hours on Fable: TLC PC, it was pretty much over with for me. It felt short for an RPG, but none-the-less it was still was very good and extremely memorable.
If and when there's a Fable 2 planned for the PC, count me in.