I've been playing the Final Fantasy series since FF:VII and honestly, the variation of the battle system always makes for an interesting twist on the gameplay. FF:X, whilst an epic story, the turn-based battle system greatly reduced the sense of immersion in the action. FF:XII's gambit system is probably the one I like most as it gives a sense of "reality" with party members being autonomous, has enemy interaction and also removes the freeze-frame before every battle. FF:XIII 'Auto-chain' button pretty much ruined the enjoyment of the battles in that game. So as long as they've moved away from that its got to be better!