@WriggleKick:
Hope you don't mind, but I made a little edit.

Some things I did/Suggestions/Tips:
1) Changed the color palette to be a little more interesting instead of just having grey as the main color.
2) Added some AA (anti-aliasing) and highlights to help make the head 'pop'.
3) Added a little scarf-like thing because I'm lazy and scarves, however redundant and overused they are these days in character design, make stuff look cool. In any case, the point is to make the character a little more interesting and maybe give them something that defines them in a simplistic way. Examples like Mario, who you can recognize just by his red/blue/yellow outfit or even just the hat.
4) Took the name of Bullit and it sounded like 'bullet' so that's what I based the head after. The head seemed to have that kind of shape in the first place anyway so I just went with it.
5) Made arms a bit stubbier, just because it seems to fit the kind of character.
Hope this gave you some ideas for your character.