I hop around quite a bit, but otherwise I am primarily Ubuntu at home (desktop, laptop and server).
I have a 2nd hard drive for my laptop which I use to try things out and for demonstrating things for the computer club meetings.
I have been trying to get openSUSE installed on there either a Milestone (got lucky with M2, but bear of a time trying to get M3 installed) or at this point any version.
I have also played with Fedora on that second hard drive, and also would like to fool around with CentOS for a server at some point.
Now if I were to get ANOTHER computer then I am not sure what I would put on it (or how long it would last)