I like independent, non-commercial online* communities, especially those centered around GNU/Linux and UNIX text-based computing. I think they're a great refuge from the noxious influence of corporate media on the Internet.
In addition to Grex, you may find me online on other places like sdf.org, tilde.team, or a few others. I also run a tiny GNU/Linux-based social "club" called rawtext.club
* well, offline too.
Tip of the day: drink more water, avoid junk food, and don't sit down too much.