It's nice.
If you'll allow me a bit of piracy, I played around with it a bit:
I don't know GIMP unfortunately, but in Paint Shop Pro what I did was sharpen the right side, give it some contrast - to give it some defnition and lighten it up a bit. Then two sunbursts (with no rays) for the eyes to recreate the glow. Duplicate layer at 60% opacity, apply a chisel effect at rubber stamp pre-set to give it the edge. Then I dropped a slight shadow, and voila.
(This is intended as a sample, and will be removed when Hurricane finishes his own, or when he requests it to be.)