I've been a [a hard-core upgrade addict](http://www.trojaner-board.de/15636-zu-eurer-erbauung.html) years ago, and that didn't change in the time since then. On the contrary, I've become allergic to outdated software, and I chose the distributions I'm using with particular attention to their closeness to the bleeding edge. I thus run Arch Linux on my desktop, Fedora on my office computer, and OpenSuse on my notebook. OpenSuse? Bleeding edge? Well, see for yourself:  With the tumbleweed repository, OpenSuse turns into a really very much up-to-date rolling-release distribution. Definitely worth a try.