@OptimusPrime Wandering.shop and Photog.social for Mastodon, one for general talk and the other for photography. Photog.social is the kind of place where people both post their photos and talk about their gear and/or process.

Also Pixelfed.social (I was an early adopter) and Bookwyrm.social (the other instances around when I joined looked too specific), and a self-hosted WordPress blog with the ActivityPub plugin.