My top 3(a real headache to get it all lined up...)
1st: Infinity Ultimate - it somehow makes every wallpaper seem the right choice, and it's really elegant imho.
2nd: Naked / Naked Noire - a real killer when it comes to simplicity, and really a good eye-candy if you want to see your wallpaper most of the times
3rd would be VOX, which when I use I somehow get myself looking at my desktop more than it would be neccessary; that skin has a certain pleasant feel to it, similar to that of Azenis 2.
My honorable mention would be Tinted; I sometimes use it as an alternate WB instead of Infinity Ultimate, since it's almost a tie in both elegance and usability.