openSUSE: Did you have problems with speed? Or nepomunk? I was eager to have a go when it came out (12.3), and has been a very raggedy experience for me so far. nepomunk constantly crashes, the system is veeery slow (on KDE at least) etc.
I'm on 12.3 with KDE, the only problem so far was making it remember the dual-monitor setup I was using. Apart from that, all good. A nice improvement over Ubuntu 12.04 with which I had a lot more problems.