Today in Open Source: Linux Mint 16 KDE and Xfce released. Plus: SteamOS beta updated, and Enlightenment 18 released.
I must confess that while I like both desktops, I tend to lean a bit more toward Xfce. I like the minimalist appeal of it just a bit more than KDE. You really can’t go wrong with either one though, it all gets down to your personal preferences.