Are there any Linux distro communities which focus on developing the user experience?

(Background: I have recently been working on open source projects with a friend, mostly assisting with UX. My expertise area is in human factors psychology, so I tend to focus specifically on usability problem. Him and I also share an interest in Linux which got me thinking …)

Are there any Linux communities which have an active UX/usability development team? Given the open source nature of many of those projects, it seems like a perfect practice ground to improve my skills (and portfolio) in usability evaluations whilst simultaneously developing a freely available operating system for public good.

I don't just want to know distros which have a good user experience (e.g. elementary OS, Linux Mint), I want to know if any of these have a community demand for a skill set similar to ours own.