Dan in Fayetteville, here.
I stumbled across Ubuntu by following a link one day from Lifehacker.com (a great website, btw). I had worked in a UNIX environment while in the Army, and had tried many years ago to get an old, old copy of Suse to run on a cheapo box that I had at the time (no success).
I'm big on free, which is part of the draw for me. The kick in the pants to actually install and get familiar with Linux was the announcement of Vista, and more importantly, the lock down issues and price structure. I'm just sick and tired of being told that I'm spending a few hundred dollars on "a license to use" a product.
Over the last year or so, I became a FOSS junkie in the PC world, and so it was just a logical jump to go FOSS with everything. I even install FOSS solutions on all of my relatives' machines to save them money and get the licensing monkeys off their backs. :)
Anyway, I'm runnning Feisty and loving it. Some command line stuff is coming back to me from the UNIX days (although I'm finding differences, of course; I was surprised when "alias q clear" didn't work in my terminal, although I bet it's just different in Linux; I meant to search that up and forgot), and so between having basic familiarity with a terminal interface and having used the Windows versions of many of the FOSS apps available in Ubuntu, it hasn't been all that bad of a curve. :D