Ok. Call my faithless, but I love to try out the new themes as they are born here in WorePress. I also love clicking onto all those Tag links just to see how the themes look and how different people use them.
I like the clean look of Ouilipo and I applied it to my test blog (unfortunately not the same content as my main blog so I cannot get an accurate comparison) and see that there are no instructions for a picture header. I uploaded a picture (horses) and it becomes part of the topmost post, rendering both the post text and the picture ruined.
One other thing:
I like having a background color, but keeping the text field/background white. That is one of the plusses of my present theme (Greyzed) in my main blog.