Going back to what I “do best” (which was talk), I can’t think of any secret hobbies, because I tell everyone EVERYTHING! 😉 Ask and you will know. Don’t ask, and you will PROBABLY still know!
I used to secretly write the beginning of a book, I would never finish, periodically. I hadn’t even shared that with my husband of ten years. But, that’s no secret, now. (https://mccrazydailylessons.wordpress.com/2013/05/30/author-to-be/)
Sorry so boring folks!! I tell you EVERYTHING!! 😉