I've enjoyed quite a few FF games. Tactics, Tactics Advanced, Crystal Chronicles, 3,6,7,8,9,10,10-2,11,12,Mystic Quest(Hah!). I've never actually FINISHED most of them, but I've enjoyed them. I do not enjoy FF13. So far, it has yet to be story based. I'm around 15 hours in, and it's still not story based. Sure, there are cutscenes, but they are hardly a significant advancement of plot. I played while a friend watched, and my friend fell asleep for FOUR HOURS. When she asked what she missed, all I had to say is "Well I crossed that crystal sea, and found an airship."
I don't think you understand how much that upset me. Modern Warfare 2 had more story in four hours. And the game seems both simplified and complex, and overall redundant. You only control the party leader, and use an overly complex menu system which eventually devolves into choosing the auto-attack. And the whole crystal upgrade thing... I have no idea how to read it. It's ridiculous. I miss the Sphere Grid.
But these are just my gripes with the game. I'll still play it, because I've heard it gets better 20 hours in, and don't let me dissuade you. I just want you to know, that even as a FF game, as a FF lover I find it lacking. But maybe you'll enjoy it.