What OS are you using?

[Judau Ashta]

This should be simple enough.

Anyways, I'm using Windows XP Pro.

[Kyoshi]

Windows XP Pro Service Pack 2.

I thinking of Installing Windows XP x64.

[Izlude]

Windows XP Pro x64 SP 1.

Some other comps have Linux but i mainly use this Windows one cause of games and junk, don't really like Wine.

[pochi]

Windows 2000 service pack 4.
Easily 5x more compatible, stable and reliable than XP in my experience. XD

[Holy Diver]

Windows 2000 service pack 4.
Easily 5x more compatible, stable and reliable than XP in my experience. XD

Other than the little thing about having a cap at 512MB of RAM.

Anyways, Windows XP x64 Edition.

[GufyMike]

SuSE for now, till FC5 is final, or Slamd has better/more packages for it, dunno, but I want a good x64 linux version. 

[Holy Diver]

I tried Linuz for awhile, but I game too much to dedicate time to it really.

Plus, in many of them, you lose conveniences like graphical one-touch installers and font problems (I had font problems at least with SuSE). Plus, I couldn't live without the Adobe and Macromedia suites, nothing really compares.

[Edward_K]

Windows 2000 service pack 4.
Easily 5x more compatible, stable and reliable than XP in my experience. XD

Other than the little thing about having a cap at 512MB of RAM.

Anyways, Windows XP x64 Edition.

Windows 2000 Professional supports up to 4GB of ram.
Windows 2000 Advanced Server supports up to 8GB of ram.
Windows 2000 Datacenter Server supports up to 32GB of ram.
http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx

You probably mean the Windows 9x series.

As for me, I recommend Windows 2003 SP1 for the desktop.

[Holy Diver]

Strange. I remeber reading that it only supported 512MB of RAM. That was back before it even got the first SP though.

[Naixn]

I use Windows XP Pro SP 2 on my home computer.
I use NetBSD on the computers at school.
And my laptop is running Mac OS X.

Well, yeah, 3 operating systems :p