Academia Eruditio (I run this) – an online community based around civil interactions to teach each other and learn about academic subjects; the arts, sciences, and everything else in between. Here you can present resources, share your notes and comments, and more importantly, conversate with like-minded people: https://discord.gg/scW5GSG

Mere Christianity (I run this) – this server was created in honor of C.S. Lewis’ book of the same name and the ideals it stood for. It’s a Christian community dedicated to strengthening and sharing our faith: https://discord.gg/w9YKwGY

The Power of Metal (I run this) – an online community based around heavy metal and it’s subgenres, primarily power metal and symphonic metal. Here you can revel in the glory of your favorite bands while engaging with the wider genres and fellow fans: https://discord.gg/tmkvvyu

Chesterton – this server was created for the discussion and celebration of the works of G.K. Chesterton; poet, philosopher, historian, economist, novelist, theologian, and playwright. It was created because of the lack of good Chestertonian discussion servers on Discord, for the purpose of having a friendly, accessible introduction to the often voluminous and occasionally discombobulating works of Chesterton:https://discord.gg/XGxCQvC

Cyberpunk – Cyberpunk is a subgenre of science fiction in a future setting that tends to focus on society as “high tech low life” featuring advanced technological and scientific achievements, such as information technology and cybernetics, juxtaposed with a degree of breakdown or radical change in the social order: https://discord.gg/3jCr66E

Those would be the seven which I am most fond of, but I am also active in the Eccentricitas Society, which is a group of servers focused on music, aesthetics, and subcultures: https://eccentricitas.com/index.html