Kelsey HightowerMastodon is the Linux of social media. The UX needs a little work but the momentum behind the project might help it overtake the other proprietary platforms.
While I can use Mastodon as is, I can't help myself from looking under the hood, and I'll be forever tempted to run my own server.
Cenobyte 
and the odd physicist. It’s been a lot of fun, but also some definite responsibility.If you’ve got a small community of friends/family, go for it.