I'm using Mint 11 on my main machine, and I'm very happy with it.
I'm running Ubuntu 11.10 on my backup machine and HATE unity. So I installed Cinnamon on it and really liked it. However....... I was wondering what would happen when the next round of Ubuntu updates came along. When the updates became available a few days later I installed them and got this error message at the end.
So I went ahead and installed the partial upgrade and it crashed Cinnamon! I guess Ubuntu just doesn't like anything that takes away from the Unity desktop.
So next ( as suggested to me by cheesemaker ) I installed Mate on my Ubuntu machine - I love it!!!!!!!! The 'good old' Gnome2 environment. I really like using the top and bottom panels, and the menu layout. But then, this is just my preference. Now I'm waiting for the next round of Ubuntu updates to see if Mate survives them. I have a feeling that the updates will crash Mate also, but that remains to be seen. So when the updates arrive, I'll post back here how I fared with them.