I've used Linux, Windows, and Mac. (Along with a few text based OS's as well). I would have to say Windows, but only because it has the most software built for it. Mac and Linux certainly have some better features, however, since Windows is 90% of the market it gets all of the attention of software/hardware houses. Consequently it also gets all the attention of viral hackers. But that leads into an entirely different argument.
XP FTW so far.







