Kewk is one of my favourites, I've been using it a lot since I downloaded it. The fancy skins are good for amusement and to show off what WB can do (G-Pod, Sektor, Antares, just to name a few) but at the end of the day I always come back to something clean and simplistic. I'm currently using Digital Cream by Robert Izsaki, it's clean, it's simple and fits well with most icons and wallpapers.
