Mastodon is my go-to “shout in the void about my goings-on” platform.

Pixelfed is where I post my original photography and artwork.

Bookwyrm is for my book nerdery, mostly.

Edit: Oh and I have a Matrix account but despite the fact that I mentioned it to literally all of my friends, nobody uses it. I keep it around in case someone actually wants to send me private messages because Mastodon is kinda badly suited for that.