It's really plain..
add some color ramping to break the monotony.
it's suffering from A LOT of banding, so get rid of that asap.
take away the black outline, and add some aa. if I remember correctly, Cloud's sword is much bigger than this, maybe make it a little bit longer?
those circles in the middle make it look really flat. add some depth by adding shadows and highlights.
Your lighting seems inconsistent, choose a light source and work with it.
You're on the right track, it looks really good, but it's just a little too boring. keep up the good work