FF1. Garland. Knock you all down.

FF2. Maybe Land Turtle because he was one of the easiest ones ? lol.

FF3. Same thing as FF2. The easy Land Turtle.

FF4. Calcabrina. Just because of the music.

FF5. Any fight with Gilgamesh.

FF6. Atma Weapon.

FF7. One Winged Angel Sephiroth.

FF8. Jumbo Cactuar. Who doesn't love a big fella with a handsome moustache ?

FF9. Final battle with Kuja. Just feels like a epic showdown.

FF10. Yunalesca.

FF10-2. Shuyin. I suppose ?

FF12. Dr Cid. Awesome villian.

FF13 & FF15. idk.

FF13-2. Caius.

Crisis Core. Even though I hate this game, the battle with Zack and Sephiroth was a-maaaaz-ing.