Disk 1's probably my favorite. The early parts of the game where it's just Zidane, Garnet, Vivi, and Steiner are all nostalgic to me, and the disk's just really fun. I really love Disk 2, though. Actually, I like both of the first two disks because every character gets an adequate amount of development. I loved the "new beginning" thing going on at the beginning of Disk 3, but Disk 3 is also the one where it became more like the "Garnet and Zidane" story, and Zidane's head just went further and further up her ass. Honestly, these games get kind of annoying once the hero gets too stuck on the heroine. I used to really like the final disks of the PSX Final Fantasies when I was a kid, since I was like, "OMG, all these bosses are so kewl", but honestly, one disk dedicated to one dungeon, a lot of boss fights, and inadequate character development just doesn't appeal to me anymore (Although Final Fantasy 9 does fairly well, in any case).