To tell you the truth, I don't really see the page-by-page thing working as a whole, especially since they're so completely different so far, but I think it's pretty obvious we can both crosshatch like nobody's business.
My problem is that I tend to almost entirely obliterate the highlights in favor of texture, making my characters less interesting...
...So my backgrounds generally are better than the subjects (see the cat picture in the Art Chat thread). So I think it would be pretty cool for him to do the characters in each scene and have me draw the backgrounds around them.