My primary OS is Snow Leopard (Mac).
I _virtualize_ (VMWare) Windows because it's the only way to properly:
- Administer an Active Directory network
- Write code that targets Active Directory
Plus, it (along with MacOS) pays my bills.
I personally don't like the idea of using Wine/Crossover because there are always native alternatives, and native will always run better from a performance standpoint. Also, the apps just don't look "quite right" in some cases, with glitches or a Windows Classic look which doesn't fit in with the host os. That's just my opinion, though.
A.