Ganderoleg, I was going to add 8. 2D Panels and Menus as well, but I forgot. I added it to the list in my post above.

I think George's most recent posts leaned towards the sister+little brother idea, and I think that's the one most people are voting for atm. The initial idea went along with a dreamy/nightmare art-style. Since I've only seen people speak against "horror" theme, I'd say we should take out or limit the "nightmare" part, and focus on "dreamy" as a general art-direction.
Ratchet posted this link in the other thread:
http://image.com.com/gamespot/images/2008/219/reviews/943284_20080807_screen003.jpg
and while I, for some reason, dislike the foreground and player character, I really like the background on this one.

Recently Hummel posted light shafts (http://www.opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=307327#Post307327 ) on this forum which we could use; if not overdone, they could work nicely with a bright background and a darker foreground.
As George (and others) voted against horror/nightmare, I think we should not make the foreground black, but I wouldn’t mind a high contrast between beautiful colors in the background and a dark-ish/shadowy style for the foreground.