I've been using Linux since the mid-90s and Linux almost exclusively for the last couple decades and I have only one question, aren't most Linux distros fully customizable? I currently run Fedora on my desktop but I've run everything from Slackware to Red Hat to Debian to Knoppix to Corel to Suse to Arch, you get the idea, and I've found all of them nearly equal in the customizability department. Is there a distro out there that actively fights customization?
None that I know of, however I'd say certain distro's might attract people who want more/specific customization
They are all customizable, but you have to remember - not everyone is a Linux expert, and not everyone has the time or the will to tinker.