Fully switched to Ubuntu (from WinXP) on a Medion Pentium 4 notebook since Breezy Badger and made my Apple MacBook dual boot with Ubuntu Dapper Drake (updated to Jaunty). I also run Jaunty exclusively on my Acer Aspire One netbook (on and off using netbook remix desktop).

Why? I like that Ubuntu is about human beings using computers, without caging them. Using Ubuntu I feel in control of my machine, while enjoying the nice desktop experience. It combines good things from the command line and graphical interfaces, but that would in part be courtesy to Gnome and the Unices themselves I guess.

Almost every time when I have something to complain about the Ubuntu installation, I don't feel left alone, because when I search on the net for the problem at hand, most of the time I find people in the same or a similar situation, and even better, they often provide very good howtos for solving it. Much of this is found on the Ubuntu forum/wiki or I find a bug filed on it in Launchpad. It's just the general feeling of making things happen together which is very nice to experience.

I also think that there is a big problem in using closed source solutions for things we all depend on heavily.

For the Samba percussion band I play in, I would like to do audio recordings using Ubuntu and an Ediroll UA-25 external recording device. Previously I was confined to WinXP for doing this and now OSX, which is an improvement but I'm not happy yet. I have used Audacity for recording in all cases. (Update: With Jaunty on a netbook you can perfectly record from a UA-25 without resorting to special kernels and/or Jack.)

I used to work as a C++ programmer (Win32 using Visual Studio). At some point we started using a Ubuntu server installation to manage our source code (Subversion), develop web services, using (PostgreSQL) databases, monitor the operational status of our products in the field and do some simple trouble ticketing. We used the Trolltech Qt framework for all our applications, so that makes up a little for having to program for Windows.

Now I work as a (web) software developer at a not-for-profit organization, happily using an Ubuntu Jaunty workstation (as our whole IT team) and Debian and Ubuntu servers for our online services, built with Ruby on Rails and Java/Seam/JSF.