Foot perspective.
a very important thing to learn: When you look at any object in perspective the only objects that appear flat are those directly at eye level. all other lines will have a curvature away form the point of perspective. -generally- when you draw a concept sketch like this it's easiest to put the perspective line at about the chest. this means that every thing above, like lines of a hat on his head, would curve upwards, not be flat or curve downwards. (UNLESS he was bent in such a way that draws the hat into a different perspective.) And (and this is the point I've been coming to VERY slowly) his feet would point downwards, and you would be able to see the tops of his shoes. the only way that his feet should be seen in that perspective that you have there, is if you were looking at him with your chin planted firmly in an inch or two of top soil.
Ignore that fact that this was done with no real care in MS paint with a track ball, no tablet. the basic idea is there.
http://img182.imageshack.us/img182/4091/feetiesxr0.png[/img]
in perspective the feet come come off sort of like this. When I'm doing my under structure i use this trick to define my feet. a ball for the heal, an oval for the toes. give it a try some time. it's a surprisingly simple trick and it helps allot.
NOW THAT THAT IS OUT OF THE WAY!
it's actually kind of a fun design, all be it a little gothey. That seems to be En vogue these days, I'm guilty of it in design myself sometimes.
I cant tell if that is a bandanna or dyed hair. And I'm not entirely sure that someone of age 21 would have that kind of huge muscular oompah in their arms.