Nope, never. The FF girls dress too... Well... Extravagant for me. The only style that would actually look somewhat good on somebody from the real world is Yuna in FF X-2. Perhaps in FF X, too. All the other clothes are just too tight-fitting. I've seen some cosplays of Garnet/Dagger from FF IX *shivers*
So no, no FF cosplays or styles to me.
Selena