My reasons why ubuntu is simple, it's only distro where i can find help for finnish. I like more about fedora but when i come to any prob with it i can't get help with my own language. I bet that's one of the biggest reason why use ubuntu, that it is for most languages in the world, and many of them has their own forum, that other distros have forums maybe english, french, german and spanish, or some more large languages, but not to small countries languages what ubuntu have.