Im using XP at the moment but the sooner Microshaft gets kicked in the balls the better.
Im tired of their market domination
Im impressed with Ubuntu. They are very close to breaking through
I've been slowly converting all my machines to Ubuntu from various MS platforms.
My desktop is Ubuntu, as well as two test machines. Four of my five servers are Ubuntu-- I still maintain a Win2K3 server for IIS implementations. My laptop is XP (soon to be dual-boot with Ubuntu) to support current MS-based clients.
My wife's machine is on its last MS implementation, and she's been made aware of it. I'm starting to transition her to OpenOffice. Otherwise, she'll be Remote-Desktop-ing into a virtual machine on the Win2K3 server for her MS work.
Ubuntu is a breeze to install and maintain, and I'm certainly not a Linux expert!