John, unfortunately it isn't the OS, as they say "it is the apps stupid"... no offense meant but it is WHAT I want to do that drives me, the OS is the vehicle that provides the mechanism to use the app.
That said, if all you use your computer for is e-mail, some letter writing, surfing the web, picture/video editing, or an occasional spreadsheet, the choice of OS and apps is wide open.
Companies that wrote internal applications, not much of choice without a lot of planning and programming. A reason some versions of Windows was slow to be adopted.
Not sticking up for MS or anyone else. Just stating facts that some might have little choice here. Want to play some games, go to GAMEHOUSE.COM and you'll see almost every game they sell is available for the PC with a few for the Mac, and PC means Windows, and some are NOT W8 compatible. Unix derivatives, nada...