What Linux desktop do you use?

If you're a Linux desktop user, I'm curious to know which desktop you believe to be the best/the one you use on a daily basis, or at all! There's been a lot of change in recent years, with KDE4, Gnome3 and Unity coming into play, curious to see how the Linux community stands ATM.

http://gopollgo.com/what-linux-desktop-do-you-use-currently