FFIV:
Liked - Cecil and Kain
Disliked - All other characters, storyline, locations

FFVIII:
Liked - Complicated storyline, emotional plot, main character; Squall
Disliked - The Junction system, Rinoa, Selphie and Irvine

FFIX:
Liked - Good storyline, detailed settings, beautiful music, great characters (Beatrix and Kuja), best mini game; Chocobo Hot and Cold
Disliked - How it started out, character designs

FFX:
Liked - Impressive graphics, storyline, characters
Disliked - Battle system, side quests/mini games

FFX-2:
Liked - Shuyin and Lenne sub-plot
Disliked - Everything else