This is a ridiculous looking version of myself and I will use it for a birthday card for my boyfriend.

Usually I use more gradients and no borders for my illustrations, but I wanted to try something new. Now I'm not sure about the shadows/highlights etc. and I feel something's wrong with the hair. Any tips?

I'm not certain whether I'm gonna use that illustration on the shirt (it's from a wallpaper I've done recently), because it might be to detailed? What do you think?