For later viewers, this question is answered around 41:28 NOTES FROM ANSWER: As an exercise, David took a Bridgman book, copied all the drawings, then closed the book and created his own art. He did this exercise twice and was a very different artist afterwards. Hogarth didn't work for him stylistically. The goal is to find the style that works for you. Bridgman is heavy on structure. Will destroy the accuracy to make sure it's structurally sound and interesting Hogarth will destroy the structure to ensure the gesture looks dynamic.