After creating numerous CakePHP projects (some for real, some for testing) I always found myself fixing the default stylesheet (which, imo, has some really strange things in it).
That is why I decided to create a clean version of CakePHP's default stylesheet (cake.generic.css).
My version brings the CakePHP style back to a minimal, while the default Cake layout elements still work properly (think of pagination, debugging, action-links, etc).
I got a page on my blog for it, and the source can be found on github.
Here is one of the screenshots of the new layout, some more are found here, compared to the original stylesheet.