I recently picked up a PS3, so naturally I'm a little curious about FFXIII. A lot of people I know online and in reality were disappointed with the game; I understand this is far from uncommon.

What I'm wondering is this:
If I trim my expectations off at the knees, and approach FFXIII expecting nothing more than a diverting action RPG with lively combat and quirky characters, am I likely to find it worthwhile and enjoyable?