Distros can be temperamental to install. I have to jump through more hoops
with some. In recent days I have installed both OpenSuSE 12 and Mandriva
2011 and neither would install from usb key using UNetbootin. I burned RW
DVDs and they installed, but grub would not work for either, so I have only
used them from the Live disk. Both use grub legacy. Neither picked up other
installed distros that use grub2 and the grub2 distros pick up the
installations that use grub legacy, but they will not boot. I have not
encountered this problem before and am still working on it.

A nice thing about OpenSuSE is Tumbleweed which effectively makes it a
rolling release. I have to get SusE to work to try that out!

Fedora 16 installed without a hitch and I used it for about a week. Great
distro if you do not mind tinkering to get things to work as well as in
Kubuntu. There are some great online guides.

Next on my list is Mint 12 and perhaps Arch which I have
only previously installed in a VM.