Started using Linux and StackExchange since Ubuntu 12.04 LTS. Then Upgraded to 14.04 LTS. (with clean install). Then perfectly used Xubuntu 14.04 (by installing
xubuntu-desktop environment) for about 6 months.
Now I am using Trisquel (GNU/Linux) 7.0 LTS.
I recommend visiting the Philosophy of GNU Project
As I've replaced Ubuntu 14.04 LTS with Trisquel 7.0 LTS, Now my question(s) are became off-topic on Askubuntu so, I continue to Unix & Linux. But still sometimes I contributes on Askubuntu by Answering, commenting , Reviewing , Closing etc!