I don't really do request as I never know if I'll find time to do them. I will definitely consider your suggestion whenever I'm doing my next sketch dump though. I can't really make any guarantee that I'll be able to draw what you suggest. Also I generally post those on my Tumblr since there is a lot more freedom there.
Not to mention I'm super busy trying to do Halloween/Horror pieces this month so it could be awhile before I get around to doing a sketch dump.