I get the pleasure of dealing with many different versions of Windows and Linux every day. Windows XP, Windows 2000, Windows Server 2003, Windows Vista (which really sucks right now), Windows Longhorn (soon), RedHat Linux, Suse Enterprise Linux, Novell, AND soon to be Solaris.
Some days there's nothing that really works right in that laundry list of operating systems.
One of these days I want to buy a Mac Mini or small Macbook and dual boot XP with it. Then again I doubt I'd have any need to dual boot since the only compelling reason to do so is to play games with only Windows support. I dont play any games, so no need for Windows.