Yeah, some of the shadows are kinda wonky...also, why are you using 7? Not to suggest illegal activities, but it is possible to get CS4, or 3, which is what I prefer.
Pretty nice art, its just the little details what its lacking.
Like you should add some reflections and a little bit more shading.
And be careful with the sharp edges.
Vox sucks
[10:14]<siku> magnificent sparkling vampire
[10:14]<siku> i love you edward