Here is a little story of a former Microsoft employee that switched to MacOS X:
I worked for Microsoft for eight years. I’m a long time Windows loyalist. […] Now that I can see them side by side, it’s obvious that the Macintosh provides a brighter display experience than the PC. It’s a more aesthetically pleasing visual experience. It’s less cluttered, and feels less stressful to use than Windows. The Mac just doesn’t get in your way the way that Windows does. […] Apple’s innovation will be an inspiration and guide to Microsoft employees for some time to come.