I take lots of public transit to and from the places I go. And I usually draw quick gestures or faces of the people I see. Being on busses or trains are usually a bumpy ride thus forcing me to draw fast. Now and then Ill take a BART or ferry across the bay and get a bit of a smoother ride. Thats when I take my time and draw from my imagination. Heres a quick one of a man reading in a big ol' chair.