What's the best Final Fantasy game?

[Auhim]

Played games (in order of preference):

1. IV (GBA)
2. X
3. IX
4. VI (GBA)
5. VII
6. X-2
7. Tactics Advance
8. III (DS)
9. Crystal Chronicles
10. I (GBA - in Dawn of Souls)
11. XII
12. XII: Revenant Wings
13. XI (PS2 Beta) 

Unplayed games (Intending to play–no particular order):

II
V
VIII
Tactics (PSP Remake)
Crisis Core: FFVII