I'm afraid XFCE did disappoint me. I tried it for a couple of months, then gratefully installed MATE. I may yet try Cinnamon, but the urgency has waned.
I installed Gnome 3.4 on a few machines for relatives/acquaintances. After adding a half-dozen extensions and fair bit of "tweak"ing, they are more or less satisfied. Their browser environment is the lion's share of their user experience. The greatest difficulty, there, is when they try to open a new attachment type, and must know to root around in /usr/bin to find something to run on it.