dstiles - 10:40 pm on Dec 16, 2012 (gmt 0)
As noted elsewhere in this forum, I gave up on ubuntu 12 within a short time of installation. I installed Mint 13 Maya (14 is now available but I haven't upgraded yet). I run only a few KDE apps, not the full KDE desktop. I use the Mate desktop, a fork of gnome (which itself has been discontinued).
Mint has underlying ubuntu code but a different desktop so anything ubuntu should run on Mint.
As to stability - it's been running without reboot now for 32 days; last reboot was due to a software kernel update. From that point of view, Mint seems less in need of reboots: I've rebooted my two ubuntu Lucid machines at least twice within that period due to OS kernel updates. Odd since the Mint core is ubuntu. :)
Have to say, system crashes on Lucid are rare and Mint not at all, so far.