I've been using Windows Vista one year ago, I started with Vista RC1 and it was very hard on me to adapt myself using a new Beta software Windows Vista and Office 2007, but since the final release shows up this year I moved too, and I learned lots of things in Vista and so many programs now support this new operating system. But I found out that Microsoft lies or I can say it in other term that you can't run Windows Vista running 512 M Of Ram, of course you need at least 512 Mb of memory to install Vista but you can run Vista machine normally. even if you have 1024 Mb of memory it's not enough. So why I'm back using Windows XP on my main machine... that's because I finally realized that I need a super machine with VGA Cards PCI express 16x bit and more of memory up to 4 Gb ... or I have to turn back to one year ago and install a fresh windows XP. and I'm happy with that cause Windows XP can do anything for me like Vista does.. and for more interesting things, the new feature that will come with SP3, I read an article about "Windows XP SP3 to Include Some Vista Features" another one that reveal New Features Discovered in Windows XP SP3: Is It Better Than Vista?
SO I'm Windows XP user until further notice