Interesting challenge.
I've played 8 of those games, but the only one I've actually beat is FF6. I got up to the very end on FF2, FF7, and DQ3, but never beat them.
Anyway, I don't think I'll do this, at least not for a while, seeing as I don't have most of them (FF8-11, all DQ) and also, I can't stand playing FF1.