There should be a kind of “sorting hat” personality test to attract the interest of prospective Lemmy joiners. People who love solarpunk stuff, for example, would easily find their home in slrpnk.net. Set a link to it on sites like join-lemmy.org to make the fediverse more approachable to casuals.
I love it, but the test would need to ask our preferences about federation and if that’s a priority. In my case, I’m in this instance because it lets me read a lot of other instances (even the infamous triad). I don’t know if we have a certain personality; I just like to lurk diverse communities.