hmm for me it would be the way that in X there was no free roaming...it lowered the lifespan and completion time by half easily!
Tetra master god that was infuriating and you got treated to a glitch that deletes all your hard work if you complete it
don't mind some other species such as Shuumi tribers including a couple of moomba's but IX had too many to be logical
mini games that are compulsory damn it there were too many in VII for me to enjoy the very deep story
Cait Sith I rest there without comment
the phrases BOOYAKAKA or YA KNOW speak english you GRRRRR
Weak main characters like Tidus where it's y arrogant and not great at physical combat or magic for that matter unless you spend 200 hours personally on them alone building them up and their equipment oh wait let me include Zidane here as well
weak enemies - I completed IX at level 35 where was the difficulty I walked it through the end without cheating I want a challenge I.E. Sephiroth w/o KOTR
the lack of great weapons such as Bows, Crossbows and Spears I saw spears in VIII on the NPC cadets in the garden battles but why not let one of the main characters use it I don't know Rinoa could've used one effectively or Quistis or Selphie
the fact that no matter what you equip most weapons or armours strangely look like the characters default weapon