People and their invented histories.
"First I choose a pic from web (Facehunter or Sartorialist), then I draw and then I read whatever comes to my mind about that person drawn on my sketchbook. It's fun!" - Fernanda Guedes
One of our favorite past times, or ways to pass time, in an airport, restaurant, hotel pools etc, is to create stories behind strangers that we see. I agree, it's great fun. You should try it out sometime. Also, I love this gal's art.