Hi Neil,
Many people are just used to what they learned. In my case, I learned the Mac OS first. I still prefer OS X over Windows. Also, I can hit the new Apple HQ "Torus" with a rock from my parent's house now. I think that Apple knows about its issues and is working toward fixes and improvements. I know this because I have done a couple of inside contracts there. Those folks are some of the hardest working, most dedicated people on the planet.
Tess, just let us know the kind of work you usually do so we can make the best suggestion for you possible.
Thanks,
Kevin