With an image like this I personally think you have to go with your own decisions as to what will work.. As it is mate I like it and would be reasonably happy with this.
Thanks for your commments. I wanted only to know from you "pros" if there is something that is a real mistake, like f.ex. too much of an effect like sharpening or something like that. But I guess from your comments that there isn't anything so I'm happy .
I agree with the above comments, M8! It's a highly stylized piece of art so there is no "right" or "wrong" about it. It's your personal vision. I find it to be visually appealing. Keep on keeping on! :)