I loved FFX's storyline, however, the sphere grid is the most annoying thing ever....
I loved FFX-2 for its active time battles, really fast paced and get you on your reflexes, also the combo chaining can be really addictive, it has become a habit of mine to use a Trigger Happy and letting the two other girls to attack as well, thereby creating a rather long chain! you should see the the speed of my fingers!