Wondering how to find other people on the Fediverse that share your interests?
Check out #Trunk! It has lists of Mastodon users who have self-identified as being interested in or someone who posts about everything from Audio Engineering, to Librarians, to Fountain Pens, to Plaints, to Sailing, and more!
I'm on the Described Media list for example, to express that I'm a user that describes the content of my posts, such as through alt text. The list helps me find others who describe their media, and helps others find me!
It also gives me an idea of instances I might want to move to if I want to find the company of where those on the lists are posting from.