This one may be a bit controversial ranking above others, as plenty of Final Fantasy fans straight up despise this game and would like to see it stricken from the franchise's history. Those fans are also wrong.
I'll grant you Vaan is somewhere between annoying and forgettable, and all the characters do oddly look too similar, but that's about where the criticisms end.
Gameplay-wise, FF12 is very solid and offered a satisfying experience capping the PS2 era as the consoles were about to change over. The map-based skill system was interesting to learn and play around with, while the completely redesigned combat was a fun change of pace, and unlocking all the monster entries offered a reason to keep playing previous areas.