I mainly run Windows - Windows 7 on the work machine and both home/work laptops and Windows 8 on my home machine (even after using it daily for a few months, I still prefer the classic Start menu to the Metro interface). I also have a Debian VM that I run off an external drive in VirtualBox.
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"Tongue tied and twisted, just an earth-bound misfit, I" - Pink Floyd
(and then the tower cleared me for take off)