Poor Cerveza...
Anyhow, with VMs, it's kinda fun to go and test-drive these kinds of operating systems. If you screw it up, you can just delete it and start over.
For me, VMs are a little more. When I'm running Linux, I always have a Win2003 VM running so I can access Trillian, Lotus Notes and .NET stuff.
But my main work computer and my main desk computer all run Fedora now. One is F8 and one is F9. My gaming computer is still Win2003. I'm still running 32 bit versions of everything since most multimedia codecs out there are only for 32 bit OSes. It's been rare that I've had more that 4GB of RAM installed anyhow.