Not keen sorry, painting is very abstract and kinda like fairoak's cartoon style, but not to his execution, and but just doesn't feel right sorry. Ray/Shaun in particular looks quite poor I have to say. Sorry sometimes it's postive, sometimes negative.
I can't advise you on how to improve these as my painting style is totally different. Thin your paints and use good quality brushes defiantely and painting cleanly is the secret, maybe concentrate on black lining first and build your block colour up, rather than this heavy/artificial shading style you've got.
Offered in good faith not malice so good luck with the rest.
The Commander