Took me a while, but finally done
I started shading it in my usual style, but then went back and tried a more 'economical' means. Not only did it take a lot less time than my usual soft shading, but I feel it's a bit more three-dimensional as well.
Credits: Some of the brushes used in the background were courtesy of M@. (If anyone has a link to his work or site, please let me know! I don't have a reference to his site/contact at the moment because I downloaded it a long time ago, and I can't seem to get any proper search results because of the @ in his name
oh, and Merry Christmas