What are you using at home? If you have more than one computer or boot partition, select the one you use the most.
I have three computers. One is 9 years old and running Ubuntu Linux. The Macbook is running OSX and Windows 7 beta in a vm. The iMac runs OSX. I'm gonna start using Windows 7 a little more but so far this year, OSX is what I use at home the most.
I used to tinker a lot but these days not much time. Always had a fascination with the free OSs but really, no no no time any more for such things.