I am loving Linux right now. Not sure why, but I guess when I'm using all three major operating systems at once, you can really tell the difference. I'm using Linux (and rarely Windows) on my main computer, Mac on my laptop, and Windows at work. The only problem that I have with Linux is that a lot of the games I play aren't compatible with it, and my printer isn't either. If they were however, I don't see a reason why I would ever use another operating system unless I was forced to like at work or on my Apple laptop. Everything runs better on it, there's more customization, and I feel good about not having to pay for software and the ideal behind Linux.
Linux > Mac > Windows
Linux > Mac > Windows