For me it'll always and forever be about FF9, I feel. To me, it represents the very best of what FF is and can be on all levels - with, perhaps, one notable flaw. It has a wonderful, heartfelt story with well-sketcehd characters with real personality. It's equally light hearted and dark and ominous, and tackles some important real life issues - things like terminal illness, post-traumatic stress, death, familial problems, and so on - but holds on to a youthful soul. The battle system is smart and fun - it's just a little slow, its one deadly flaw. But nothing's perfect... but FF9 is, IMO, about as close as you can get.