1.VI- Best RPG ever bar none imo. So much replay value.
2.X- Ticked all the boxes for a great FF
3.XII- Most underrated game in the series. Vaan & Penelo ruined a magnificent game.
4.VII- Only this far down based on the fact during a recent replay it felt kinda dated. Still amazing though.
5.IX- Solid game but the setting wasn't my favorite
6.IV- Generally good but doesn't really compare to the games above it on my list.
7.XIII- I actually enjoyed 13 even if it was REALLY linear. Enjoyable but a bit of a disappointment still.
8.VIII- Not sure why but I just didn't enjoy it as much as the others
That would be 2nd on my list. I still haven't played the PSP re-release (I own it) of that game, and I probably should this year at some point. It would be the only other Final Fantasy game to maybe make my top 10 all time list.