I prefer KDE. Unity has a mix of in-house, mac-style and Gnome design. I can't say it provides the best UX. It does provide consistency which makes it the most

I prefer KDE. Unity has a mix of in-house, mac-style and Gnome design. I can't say it provides the best UX. It does provide consistency which makes it the most popular distribution and desktop environment. On the other hand KDE is much more versatile and perceptive of user's choice. It has a rich set of software which includes a full productivity suite of KDE PIM (personal information management) and all Qt apps fit pretty well in KDE. KDE heavily uses widgets which makes your overall experience better. You should give OpenSUSE 13.1 or Fedora 20 KDE a try.