First FF I ever played and got into? If my memory serves me right it was FF I on DoS. It was the first one I finished. Of course I heard of FF before, a friend of mine was all love about FF X. And I played some NES games which happened to be FF's, and some SNES game which happened to be FF's, but I didn't know that at that time.

Then I started playing FF IV, because I saw Child Rydia's menu face and I thought she was cute, so I wanted to play that game. ^^"
After that, I pfinished VI, than V. Then I finished IX. Lol, and that all in... yes, it'll be close to one year.