I dabbled previously with various GUI driven Linux flavors, but it wasn't until Ubuntu about 4 years ago that I began to run a box and stick with it.
I ran it side by side with my XP box at work and synergy to share the keyboard and mouse.
About a year after I started this at work, my home computer blew up and I couldn't find my XP disk. I decided to load Ubuntu as my primary OS and use it until I found something I needed to do but couldn't in Ubuntu.
I still run it as my primary OS at home with another Win7 box that I start up when needed. -Mainly for IE only compatible web sites or to play some random game, but I am not a gamer.
It is amazing to think of what is and can be done with the various flavors of *nix software for absolutely no cost and the contributions of time, bandwidth, and other resources by hordes of coders, corporations others.