Ask HN: Who on Twitter improves your intellectual and mental health?

I used to be very active on Twitter, but have been dormant for a long time.

I intend to get back into it, but I am finding 99% of content to be utterly vapid, self serving and misdirecting.

In contrast, I have always enjoyed twitter links posted here, even on esoteric topics. So I wanted to ask - who do you follow on Twitter where you get true intellectual or emotional value?

Also happy to get recommendations for Mastodon servers and people!