You run Windows on your Mac if you...
- have lots of heavily formatted Word docs from your previous computer life (Pages does a poor job interpreting Word formatting),
- have lots of b/w pics with a gray scale profile (pics will display with Windows Image Viewer but not with iPhoto),
- want a travel planning apps on your computer like MS Streets & Trips or Delorme Street Atlas (neither available for Mac),
- have a website and its HTML translation tool only works with Windows.
And as time goes on I'll probably run into more Windows only situations. No problem! I have great, well-built, stable Mac hardware that can handle it.
(BTW, I am logged in to this forum using Safari)