Actually you can not compare Windows to Mac, or Linux. Windows is in a world all of there own. Very prone to virus and spyware you have to stay on top of it.

Right now I am using Windows Vista on my laptop and Windows XP on my desktop, I have no choice because this OS comes with the unit when we bought it. If give a change to experiment I want to install Linux operating system

Windows Vista

OS X 10.6. ...but I hear Win 7 is pretty decent too.

I can say that windows 7 will be my next favorite OS after windows XP. I still have windows XP as main and 7 on test machine.

I am just waiting for 7 SP1 then I migrate :)

I used Windows XP sp2. They say that Windows 7 is good. I don't know, I haven't tried it though.

Windows Xp is the best ever ..!

For me I am using Windows 7 and Ubutu. Though I am not using Windows XP now, it is my favorite Operating System till now. I like Ubuntu too.

I would say Windows 7 is the way to go. For me, in photography, I do prefer Mac OS.

I am using window XP professional with service pack 3 because its work fine and more reliable to other XP editions.