I never used Vincent as he goes berserk when he uses his limits. Also he only has 4 beasts he turns into, one for each level. I never used Cait Sith cause he only has two limits. I never used Irvine from VIII cause I hate buying/selling ammo. I never really used quina either seeing as I usually only use Zidane, Garnet, Vivi, Stenier.

However I do go on playthroughs where I use them. They just aren't my favorites. I got all of the rages in VI. I have gotten all blue magic for every final fantasy. I typically play to get 100% of everything. I also usually level all the characters to the max level.