Pretty much only Lemmy. I like and prefer the form of post which can be media or weblink with description or just text and text is unlimited, with threaded comments for discussions and comments, and thematic categorization (in communities).

Occasionally, I open https://loops.video/ or some other random platform. That’s nothin regular, though.

I have accounts on multiple instances, which is another layer of thematic separation. Community spread and content duplication is a downside, but also a technical consequence of the design.