I have… way too many, and pursue them with varying degrees of time investment and zeal. Here are a few.
Finance & Monetary Policy
National Security/Arms Control/Intelligence/OSINT
Disaster Preparedness, Recovery, and Response
Learning/Human Cognitive Performance
This was kicked off by “Learning how to Learn” on Coursera and I’ve since read PILES of books about it. Things like spaced repetition (in the form of Anki) have shown strong enough results for me that I’m now hooked and want more understanding of how to make my brain better at doing what I want it to.
I’m studying. I’m very bad at it.