I enjoy Mastodon a lot, had two accounts there since last November. It’s good for just quick casual updates and convos that don’t take much thinking or drain your social battery. My partner is on Pixelfed but I just follow him from Mastodon so that works well.
Recently signed up to Bookwyrm because I was saving way too many scifi book recommendations on here and figured it made sense to organise them somewhere.
I use LinkStack for my content creator alter ego, and am considering getting into PeerTube too, but need to look into that more.