It started out as one of many expression studies.
It then became part of my second model sheet.
Then I got completely carried away and made a new avatar in the process. 
I really aimed to apply the color dynamics we've been using in my art studio class to this, and I think the more harsh lighting and shading really worked out! 
I've been using a scaled-down version on FA for a couple weeks now; thought I'd get around to uploading the full thing!