Nothing specific to be honest. I think i just miss the variety of apps and having to fix my pc on a daily basis because something went wrong lol
That's why I un-switched! The worst part was "If it broke, just reinstall the OS!". I'm sorry, but coming from a world where system restore or a few registry keys could pretty much fix anything in under 5 minutes, the attitude of reinstall the OS to fix a bug was the final straw... that or the expose in snow leopard, that made me go to Windows 7 as my main OS.
Either way, OS X is still a rock solid OS 99% of the time, and because of Final cut I couldn't live without it