Your Main Operating System?

What do you use on a daily basis? What's more productive or fun for you?  Do you spend more time compiling packages or more time developing? Are you a Linux, Mac, or Windows user?

I currently have installed as my MAIN OS, Gento 12, I also have CentOS installed as well.
I was using windows up until all my windows programs worked perfectly in Wine so I no longer needed windows + it wasn't my favorite OS to use (that's OSX)  and the fact that stencyl works perfectly in linux is awesome! Haven't downloaded it in Gentoo though, looks like it's only tested on ubuntu(as far as I can see).

So, what's your main OS?

This should probably be a poll.

I use Windows and Mac-Mostly windows, now, though.

Mostly Windows XP. I sometimes use Ubuntu, but rarely.

Mac OS X 10.4.11. ^_^

Windows 7 is backup only for communication if a malfunction were to happen, and not regularly used.

Mac OS X 10.4.11. ^_^

Windows 7 is backup only for communication if a malfunction were to happen, and not regularly used.

I'm assuming your on an iMac that was preinstalled with tiger?  Didn't know tiger users still were around considering apple does release stable updates and major OS releases.  Unlike windows lol, took 3 times just to get windows 7 right. 

I'm selling my PC for a Mac pro so my only computer is my Mabcook pro(July 2011 model) that run Lion(awesome version of OSX!)

I'm a Mac user.