When I'm not reading a book during my commute, I'm usually people-watching. I'll admit, I'm very sneaky: sometimes my book is just for cover so I can people-watch all the more! The subway is a great place to see everyone doing their thing. You'll see just about everyone on the subway,
tired, older ladies on their way home from work,
fashionable young men,
hipsters (that mustache was for real!),
people engrossed in their reading material,
and, of course, missed connections.