Cats. Mastodon has a lot of cats. It's great.

I follow hashtags on Mastodon sort of like how I follow communities on Lemmy, but instead of "content" I get quick thoughts from people. It's different but, as someone who also didn't use Twitter, it's nice to have a space where the barrier to engagement is a bit lower; you need a thought, not a link or discussion, and sometimes that's enough to prompt engagement.