Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Unlike Ubuntu, Peppermint or Fedora, openSUSE is a fully-fledged KDE distribution, and offers the most integrated experience of all the distributions we've looked at.
With openSUSE, this approach stretches to non-KDE applications too. For example, despite using GTK+ for its widget toolset, Firefox is skinned to look like a native KDE application. That includes the toolbar icons, framing and file requesters, and even functions like mailing a link will use KDE's mail application rather than the default.
It's a similar story with LibreOffice, the forked version of the OpenOffice.org office suite. Happily, openSUSE is the first major distro to include it on any desktop, and thanks to Novell's many submitted performance and stability patches, it's also the best Linux office platform available.