My deal with tats is to have them where you can cover them up and have what resembles you and your life. If the Final Fantasy series is a huge part of your life then get a tat that resembles the fact. In many years time if you don't play them any more you can look back at the tat and say back in sucha sucha I used to be so into that.
I've been thinking about getting the FFX logo on my lower back. Unless you are a FF fan no one will know. I'm totally obsessed with the world of Spira - one can never know too much lol
So go for it and design it well