When are tough problems fun and enjoyable? Is it a puzzle that requires deep thought and problem-solving? Or is it a book or movie with a complicated story that requires attention and careful deduction? What makes this challenge enjoyable? Is it the mental stimulation, the sense of accomplishment, or the satisfaction of overcoming an obstacle? Ponder what about complex things you enjoy, and how you might apply these to others that don’t appear as enjoyable at first glance.