I love drawing people in the train, but unfortunately, my schedule and location make it so I never get a seat! Drawing careful sketches on my notebook while standing is out of the question, so I've been using a simple painting application on my phone instead. This is good in a way, because it is forcing me to be very straightforward. The constant shuffling of my fellow passengers getting in and out prevents me from looking at anyone for too long. I have just a few seconds to capture an impression and move on, sometimes not getting anything more than a silhouette.
Here we have 50 quick drawings of the beautiful people of Boston. More to come :)
Edit: the iPhone app I used is called Brushes (here is the link: https://itunes.apple.com/ca/app/brushes-3/id545366251?mt=8)