My hobby: collecting decks of cards. Most of them from the U.S. Playing Card Company.
This is my favorite back, the League Back. For years, I thought it was only available through Bicycle Games Rummy. Then, last year, I saw a League Back deck at a magic shop in San Francisco.
The guy at the shop was very friendly and knowledgeable. I don’t think he got the fact that I just collect cards though.