My main two hobbies are gaming and reading. My third hobby is turning those other two hobbies into homework. That is not sarcasm; I love managing wishlists, surfing recommendations, and visualizing my stats with sortable spreadsheets and colorful pie charts.
With gaming it's easy. I dabble in spreadsheet logs occasionally, but I mainly lean on Steam to manage my gaming library and wishlist. Hobbyist reading apps, however, still leave a lot to be desired. Honestly, they could all learn a thing or twenty from Steam.
