5. Final Fantasy III
The job system doesn't do it for me. While I liked it in Tactics and (to a lesser extent) FFV, it just wasn't as compelling here. The plot and world wasn't very engaging either. Still fun, though.

4. Final Fantasy II
Not a bad game, but a comparatively weak one. The characters lacked personality, the character development system was too simplistic and easily exploited, and the plot was cliche. But it is an NES game and it was ahead of its time. Not a bad game at all and still quite fun.

3. Final Fantasy X
Unlikable protagonist, ho-hum plot, and linear gameplay. The setting was cool, Lulu, Rikku, and Auron were nice characters, the music was nice, the the battle system was great, but the character advancement was poorly implemented, the character deigns were either boring or stupid, and the writing was just bland and uninspired.

2. Final Fantasy VIII
It felt like an anime. In the worst way. The main cast was hopelessly cliched, the battle system lacked innovation, the Junction system felt like a less-impressive Materia system, and the plot had cool elements that were poorly implemented. On the plus side, the look and feel of the setting was one of the best in the series, the soundtrack was unique and memorable, and Laguna was a nice enough character.

1. Final Fantasy XIII
It's a shame. The characters and their interactions were good and the music and graphics were good as well. Too bad the plot was uninspired, the battle system was mediocre, and the game world was so damn empty. It felt like a Final Fantasy you'd play in an arcade. A shame, this game had some great ideas and concepts that were absolutely shat on.

I haven't and probably won't ever play FFXIV so it wasn't included.