Favourite FF: VI
Overall better game. Everything is top notch, multiple characters with depth, great story/pacing/'stageplay', great villain, great music, gorgeous sprites, great battle system, iconic moments..
Favourite Character: Vivi from FFIX
I just identify with this type of character, unusual/odd hero (not your typical strong adventurer), introverted, feeler, introspective, etc.
Special mention to the most underrated from the series i've played so far and played again recently: FFV & Lenna <3