Brighter artwork with more wallpapers

I think that Ubuntu's artwork, especially the wallpaper is too dark for many users, which makes it less attractive.
Ubuntu has an interesting graphical identity thanks to the choice of the color brown, but i guess the user would be more pleased if he had the choice between more wallpapers, some in the ubuntu GDM color theme (which is brighter than the desktop's) , and why not some with beautiful photos (have a look at SuSE's wallpapers, they're great!), while always keeping the spirit of ubuntu (photos of South African landscape, etc for example)!