Hmm, I guess the newer ones are for the new generation? And heck, you're telling me XII wasn't good? I loved that to bits! (12 that is). X was my first FF game, and I enjoyed it, as for x-2, I didn't even give it a second look after I saw how they messed up the game play.
I have tried to play the older PS titles, but it just didn't click with me, probably if I played it way back then, then I would have enjoyed the nostalgia, but to not have played it to begin with sort of put me off from playing (that, and mainly that I didn't have time for it to begin with DX), but I just know the older PS FF titles are a masterpiece ^^