Paintover? pointers maybe?

[eZTarg8]

So... I've submitted a piece for a group on DA and it's been declined yet again, and comparatively to some of the work they display I can't for the life of me see where i'm going wrong on it. I really tried on the composition, placing the focal point using the rule of thirds, working to a fixed (if slightly surreal) perspective, did my damndest on the lighting, but its obviously not quite right. (woah is me, moan grumble etc etc) but whilst it shouldn't matter that it gets accepted to this group...it sort of does, in that it would give an indication that my work is becoming a lot more competent...job worthy so to speak. I'm guessing anatomy is off...but maybe sharpness as well...I'm not sure though (possibly need to distance myself from the pic for a bit to spot the errors better) any how...an outside eye would be very useful to spot the stuff that i'm failing to see.
http://eztarg8.deviantart.com/#/d5j8ibf

I'll attach a smaller version in a sec

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eeeugh...my IT skills are lacking in being able to attach or insert this image...either that or attachments have been disabled