Well I'm, all for it when it comes to size transference, it's my favorite scenario. And I've recently taken up renders too so I'll be glad to help you.
From what I can tell you're doing a great job with the expressions. Great poses, and fantastic story and dialog. You've also got very deep shadowing, it's a small distraction on some of the images, but nothing very drastic
Which software are you using? Poser 7? Daz?