I'm on Mastodon, myself. When I first signed up, I joined mast.o, but I wasn't really feeling that, so I did more research, found retro.pizza and realized that it was perfect for me.
Quite frankly, every server should have a "No Nazis, no TERFs" rule at the very top.
I’m on lemmy and kbin as well. But I’ve since realised that all (I think) places I want to follow on kbin I can also read and interact with from lemmy. So I’m thinking I’ll just stick with lemmy as my sole account.
I've got an account on a small Mastodon instance that a friend owns (migrated to there from the big mastodon.social instance). That's pretty much it! @reil@oliphaunt.social! It's named after a silly design pun where I reshaped the onlyfans logo into a more mastodon-y oliphaunt.
On Mastodon (Albeit I have some plans to move to misskey, but whether it will be self-hosted, I have to figure that out)
@Nyoelle@mstdn.starnix.network
I have an account on sh.itjust.works ... I use it when Beehaw is under maintenance, and only created it because I had problems logging in here on the first day of Redditmageddon.
It's not entirely horrible, but much closer to reddit's frontpage than here.
I have a mastodon I'm active in (on?) and a kbin that I only look at and never comment because it feels a lil like reddit to me. I've looked at calkey/misskey and while the UI looks nice I don't see a server I'd feel comfortable in that has more than a handful of users.
I signed up for a Mastadon account at fosstodon, but I don't use it, so far. I also signed up for lemm.ee just for possible defederation purposes, though I don't use that, either- I like it here, although it's quiet (or maybe because it's quiet).
i'm on sloth.run, a calckey/firefish instance. i use it to keep an eye on the 'twitter'/'instagram' replacements. i'm by far the most active here. i also have a matrix account but i don't really use it.