As much as I love lisp and hate the Nix expression language, I'm interested in actually getting things done more than I am in preserving software freedom, so I'm on NixOS.
I suppose I (perhaps unfairly) pre-judged the Guix community based off of past experiences with libre-only distros. I have memories of listserv threads and IRC conversations where it felt like people were trying to catch people daring to run proprietary software on their distro just so they could shut down the conversation with "This distro only supports running Free Software"