Your operating system - Linux?

Just for fun, I put a copy of Ubuntu Linux on my home laptop (I wasn’t using it for anything but Internet Explorer anyway), and I am very happy with it. I finally took the plunge on a recommendation and I was amazed at how simple the install was, and launching a FactoryPMI client from my windows desktop is totally painless. Although, I am running an extremely small project at home.

I chose Ubuntu because it is big on easily finding/installing Linux programs, but I am curious; what Linux flavor are you using and why?