Here's a mark from Friday.
When I study people, I look at the shape of their head, the fashion sense (or lack thereof), the way they hold their bodies, and then attempt to caricature that. Sometimes, the fashion, shape and posture don't mix...and I realize that person might be in the wrong timeline -- wearing the wrong clothes. So, I try to imagine them in a different era, with a different wardrobe.
Despite the hippy look, he had that 50's era school principal look to me.