What is your main OS?

[whabang]

At work:
Windows XP, mainly because I don't have a choise. I doubt the IT-department would let me go back to Win2k.

At home:
Windows XP and Mandrake 10.
My girlfriend would not approve anything else! :-D
I am learning a bit of Linux though, and I'm considering to switch once I know it good enough.

[whabang]

According to my own experience, the main difference between a fully patched 2k-system and an XP-system, is the lack of eye-candy in 2k. This makes the OS a little more resoponsive.