Erm, I'm slims friend, but I think he really should listen to the crtiz instead of ignoring them, but don't start over though slim, just move some stuff around, and add shading like all the other people said. He's getting criticized by what I think are the bests so far.Slim its looking good...don't listen to these fools ... just keep workin on it...it'll look much better when u add in the chest and arms
do these tweaks and lower the mouth(just the lips not the shadow below them) and it'll look better.Actually the face looks almost deadon Gogeta's. Just change the colour of the eyes,eyebrows and hair... like in Hobomasters's sig. Also like others said apply some more depth true shading.