I have been exploring 2 themes, and am still not entirely sure which to go with.
The first is "Everyday wins". The idea is a set of badges celebrating the everyday menial achievements that don't get the celebration they deserve. Its things like cleaning your apartment, cooking a great meal, or writing a long email to a friend overseas.
The other idea is "Vintage Archetypes" a set of badges depicting late 1800s archetypes like: "The Gentleman", "The hunter", "The Boxer", "The Butcher", "The Cowboy", "The Dancer", "The lady".