Xfce 4.10 is the latest release of the excellent Xfce desktop, full of useful incremental improvements and no shocking surprises.
Workflow and efficiency are everything. I want my Linux graphical environment to be the way I like it, and not an obese system hog. I have a lot of favorite Linux desktop environments (Fluxbox, KDE4, Ratpoison, E17, Razor-qt) and Xfce is always near the top.