I love the Materia system. The sheer flexibility it allows in terms of combining and augmenting skills is an unparalleled joy to explore.
FFI: Absolute Committal Job System
FFII: "Use It or Lose It" Experience System
FFIII: Job System
FFIV: Story Job System
FFV: Custom Job System
FFVI: Relic / Esper System
FFVII: Materia System
FFVIII: Junction System
FFIX: Weapon Ability System
FFX: Sphere Grid / Command Time Battle System
FFX-2: Dressphere / Garment Grid / Relic System
FFXII: License Board/ Gambit / Active Dimension Battle System
Other
I love the Materia system. The sheer flexibility it allows in terms of combining and augmenting skills is an unparalleled joy to explore.