So far I'm not digging Cinnamon. I've only played around in the live environment, but it seems to have many of the same restrictions Gnome3 has regarding customization. I right click the task bar, and nothing happens, no offer to let me add something cool. I'm sure it can be hacked around, but I like to have decent, obvious functionality OOTB. So far I've tried Mint12, Mint13, Gnome3 on Debian, and some kind of Gnome3 on Trisquel. They all lack the ability to customize.
Currently downloading the MATE desktop for Mint, and I'll give that a try. I suspect I'll like that pretty well since it's virtually Gnome2, but how healthy is the project long term? I haven't seen a reason to switch from Xfce yet...