Well, a few reasons:

-I like the story so far (especially how it has cutscenes), and I want to see the rest of it.
-The content they do have is very relaxing, and I like it. Not everything has to be so hardcore and nerve-racking. Not that I don't want that too.
-I really believe they will turn this game around, and I want to be able to say I was here from the beginning.
-I never actually met an FF game I didn't like (although XII came close :P).