it's supposed to be like that. It's a replica of squidward's painting "bold and brash"
Just a simple avatar, man. And FYI: http://24.media.tumblr.com/tumblr_liujaxRGcY1qhmg1to1_500.jpg
The anatomy seems odd to me, no neck, no knees, no ... whatever. I just think that it could be more polished and that there is something missing. The picture looks as if it was made in 10 seconds. Sorry.
I was reffering to the grey inner outlines, which create banding and so look more jagged than they could if you instead used the inner grey outlines for AA against the black outline.
I had initally anti-aliased it, but I foolishly did it with non-opaque colors, and then exported as a .gif. Would it be considered poor form to export as a .png to make it so the non-opaque AA works on all background colors?
dang, I was just about to post your description in my comment before I read it.
Anyways, you could probably smooth it out a little by changing the banding to AA.
more like "belongs in the trash"