The Bluesky I see is rapidly shaping up as most of what my Twitter was, lots of social scientists, Irish posters and shitposters, news, etc.
However, my presence on Mastodon is probably going to allow me to do something I never managed on Twitter, which is to have one nerdy, shitposting persona and one more professional one. I used to get told at conferences that I was "remarkably concerned with Brexit" etc, and used to worry about what some of my more po-faced followers thought of me.