The graphic itself is good, but High Mage Vivi is right. Most final fantasy logos are flat, almost like line drawings that use two, three colors tops in a gradient, with white as highlights. If you look at your dragon, in a typical FF logo, you wouldn't see all the individual scales, or the crinkles in the wings... for a perfect example, look at the image of yuna in the ffx logo... It's a pretty basic image that has strategicaly placed highlights to make it look complex.
Otherwise overall, it's damn good work.