Because four is awesome!! As is six!! Besides, everyone does XIII now days, so it's good to be different. :3
From four and six alone, I'll have Celes done, possibly Rosa and Terra.
It's nice because I'm doing so well at work I don't have to pick and choose. I can just make them all. The only thing that can hold me back is my skill level. And well, time. =P To make and to wear. I wish I could just wear them all!