Skulpture is a very nice style for KDE 4, very clean and easy to the eye, with a modern attractive look, having that cool appearance without sacrificing any bit of usefulness or going too far. The page is at http://www.kde-look.org/content/show.php/Skulpture?content=59031. This is definitelly the widget style I like the most, and I take into account everything from the old Windows style, to Keramik, Plastik and Vista and OS X styles.
I just found it in the Debian packages by mistake a few days ago and I like it so much that I can’t wait for more KDE 4 programs to make it into the Debian repositories.
Well, it seems that this tiny thumbnail is a little bit unfortunate, it is 200 KiB while the original image is 300 KiB.