I particularly enjoyed seeing Matisse's examples of "Fauvism." In the early 20th Century, several French artists challenged conventional methods and painted using vivid color and bold brush strokes. This early modern style was criticized by many and the artists were referred to as "wild beasts" or "Les Fauves."
For me, the use of unexpected color and freedom of form is so intriguing. I love their brave interpretations of the subject matter. It's certainly inspirational for me as I move along in my painting journey.