Balls. I've been playing Fable since the beginning. Hell, even before the TLC. I've got the entire mythos memorized from A-Z, know the game mechanics, features and then some.
I liked the linear storyline in Fable 3 for obvious reasons. The end game was always to be king and sidetracking to become a hermit isn't such a grand adventure for me. However, the sidequests more than make up for deterring and it's less busywork and more entertaining.
They reshuffled the magic system and tried to organize it from the clutter in the original game. They did it with 2 and they did it even more with 3. I'd rather use potions for slowing time and raising minions than have it cluttering up my armory. Why? Not many players fully utilized the magic system, opting for more swordplay and firearms. I'm guessing that this is their way of trying to balance the fighting mechanics. The spellweaving is freaking badass btw.
The expression aspect leave much to be desired, but I never really cared for the expression wheel anyways in the previous games. I spent my time adventuring, not schmoozing up the local milkmaid. But, this is probably to each their own, so I won't elaborate too much on that.
Probably the core element as to why I like 3 more is the emotional linkage you have with characters. Walter was probably the cornerstone of that all. I've never felt so depressed at the end of the main story. The characters are more personal and realistic, their backstories are fully rendered and it makes me do want to fight to become the monarch of Albion just so these people I met can hope to bring their promises to light. Now that's a full emotional immerse in the game.
Of course, I do have a long list of cons to the game, but I've already mentioned it somewhere on the boards. So, here's yer pro argument.