Vista.

Windows 7 Professional.

Only Snow Leopard and Win 7. For my PC laptop I used to be on Archlinux and WinXP, but the damn video card fried and I don't have money to replace it. So I'm mostly on mac now. Whatever, gets the job done and I could play games at med settings.

XP pro

Windows 7 pro on desktop, Linux (Linpus lite dirsto.)on acer netbook.

Weird more people on Vista than 7 Or XP?

Kubuntu 9.10 'Karmic Koala'.

I currently use Linux Mint as my main work/programming machine. But I need windows to play games so I have a computer with Windows 7 Ultimate set up.

Windows XP MCE on my home/gaming computer.
 
Everywhere else, Vista, Vista, Vista. Mostly because I'm too lazy to correct that.

I personally really like WIndows 7 64-bit.  I switched to that from XP recently and am not looking back.

Windows 7 Ultimate x64

Ubuntu/Fedora Linux on my netbook and desktop for general use followed by Windows 7 for gaming and Windows-only software as the secondary OS on the desktop machine.

" Ubuntu/Fedora Linux on my netbook and desktop for general use followed by Windows 7 for gaming and Windows-only software as the secondary OS on the desktop machine. "

" Windows 7. Say what you will about MS, but it's an amazing OS 
 
@shrig32 said:

" Ubuntu/Fedora Linux on my netbook and desktop for general use followed by Windows 7 for gaming and Windows-only software as the secondary OS on the desktop machine. "

To be honest, I've always wanted to try Linux, but I've heard simple things such as updating the OS and just getting it setup are a HUGE pain. I remember my roommate tried setting it up Linux on his machine and it took him nearly all day and he was frustrated the whole day. Personally, I don't know where to start with the bloody thing so where do you Linux users start to get all you know-how, etc? "

I have Windows 7, but I am quite surprised that there are so many using it. I consider it to be quite glitchy. 

Windows 7 ultimate 64-bit. 
 
I really liked upgrading from vista on my machine and seeing my memory usage when idle go down about 20-30%.  Haven't had any issues since upgrading.

I have a few computers and they have Windows XP, Vista and 7 which are all great. I do wanna try a Mac as they seem fun. :)

Linux
Windows 7
Windows XP

I'm running Windows Vista on one laptop and Windowns 7 RC on the other laptop

Posting from my macbook pro on snow leopard, but i got windows 7 installed on it too, also got vista on a comp, xp and ubuntu on another laptop...I'm basically CROSSPLATFORM'D

 Windows Vista    

Vista - Home Computer
7 - Notebook

Windows 7 all the way.

I got Windows 7 recently, and It's awesome.

Man, I really need a new computer :(

I'm using Window XP right now, but  i used a lot of OS in my life,and i still have those on separate machines
 
1.Window 3.1
2.Window 95
3.Window 98
4.Window ME
5.Window XP
 
So,yep i have 5 working PCs right now. Maybe I'll play Prince of Persia on DOS today,for old time sake.

Snow Leopard, js nbd.

" I'm currently dual booting Windows 7 RC and Ubuntu 9.04.  I mainly use Windows because this site is currently jacked on Ubuntu and so is Youtube.  Does anyone have any recommendation for fixing it?  I like Ubuntu way more I just can't enjoy my favourite site so I use it less. "

win 7 now no complaints so far very smooth way above vista.

Ubuntu 9.10 for most stuff, Vista for games

I'm a greedy sod, I have xp pro, Vista 64 ultimate and Windows 7(64) pro on the same pc (3 separate drives)  This is just to ensure I can play my game collection. Since I already owned the O/S's I just added hard drives :)

I use Windows 7 and have two versions of Linux installed on a virtual machine.

Windows 7 Home Premium x64

Go Vista 32 Bit!

I'm using both Windows 7 and Snow Leopard.

I have 32-bit Windows Vista on my gaming computer (I had 64-bit but I ran into issues with Flash and some drivers).  I have a 32-bit Windows 7 disc I got for free from Microsoft, but I have not wanted to deal with upgrading my OS when it's been fine.

Haha.  Right now I am posting from a Mac OS 10.4 Tiger machine.  I still like this old babe.  Still not a fan of Leopard.  
 
Anyways, I also have a gaming-only PC that is currently running Windows 7.  I finally upgraded from windows XP.  I was scared after my sister bought a Sony Viao like 2 years ago with Windows Vista on which she hated not even knowing about the tech worlds outcry against Microsoft for that piece of trash.  But with getting a super cheap Ultimate version through my college, I decided to bite.  Plus it is 64 bit and was hoping more games would kind of use that now-a-days.
 
Oh yeah, and I also have a linux machine that I mess around on with coding and just another computer.  I really have no interest in doing it for a job, but since I was in 6th grade I really enjoyed everything coding when I first learned HTML and then went on to Visual Basic 5.
 
1. Mac OS 10.4 - iMac
2. Mac OS 10.5 - MacBook
3. Windows 7 - Gaming Rig
4. Linux SuSE 11.(something).

Windows 7 x64 <3 <3

Runnin' Windows 7. Quite a fine OS. Thank god it's better than Vista.

Windows 7. A whole lot better then Vista. My favorite OS.

Windows 7, x64. 

On my laptop, I'm running OS X Snow Leopard and Ubuntu 10.04. 
On my gaming desktop, I'm running Windows 7 and Fedora 13. 
On my school and work desktop, I'm running CentOS 5.

Windows 7 Ultimate X64, never had any issues, its great.

Stuck using OS X Tiger indefinitely due to issues with my laptop. Namely, the disc drive doesn't read anything and I can't be bothered paying to fix something I rarely used.
 
Eventually I'll be forced to upgrade as applications continue to drop support for Tiger though. That's awesome.

Vista Home Premium 32 Bit.

Windows Vista mainly, don't want to have to deal with upgrading to 7 yet. Occasionally boot up Linux in VitrualBox for random projects.