A great OS that runs the only game a true gamer would ever play (counterstrike) fine and is much more stable. If you are tired of letting microsoft own your computer and tired of the utter lack of customizability that comes with winblowz, I recommend that you give this a shot. It is simple to learn I cannot believe anyone thinks it is complicated. If you dont feel like partitioning space on your comp to try it out, get a "live cd" of linux (such as knoppix or phlak) and just boot it up and take linux for a test drive.
I switched to linux 3 years ago. CS runs much better on my customized version of linux than it ever ran on my windows OS. I am so glad I found linux! Now I am the one controlling my comp!