This is great! I am OBSESSED with learning when, just 5 years ago, I would say I had no passions/hobbies. When I finally started letting myself gain interests, it was overwhelming! I'm so much happier now though! This is just an add on to what you have been talking about BUT have you taken the class Learning How To Learn at Coursera?? It's for free and it's information seriously blew my mind and changed my life. For years I had the worst memory issues. The course talks about how your brain works, the steps to take to cement the information in your head, and how to get past the hurdles.
Thank you for your great article! It's always exciting to find like-minded learning obsessed folk!