I started to contribute to Fedora(.us) years ago; Fedora has grown a lot since then -- especially now with the merge we are lot more people that have to interact with each other.
What really disappoints me about that: the tone on the mailing lists afaics got and constantly gets worse and unfriendlier (¹). Sure, there were flamewars in the past (and I were part of them as well), but people showed more respect to each other.
I'm not sure if I would start contributing to Fedora today if I would be searching for a project to contribute to.
(¹) -- no, there is not special mail or flamewar that got me to write this blog entry. Just a general impression.