It may be genetic. My dad and aunts have all done something similar. They can all sleep for a short time and wake up refreshed and ready to resume activity. I must have inherited this. If I skip my nap, which I must do when working or busy, I am more tired, a more restless sleeper and it seems I accomplish less. As an adult many people think taking a nap is childish, lazy or just plain strange. But it's really the opposite. It is the result of listening to my body's rhythms, daring to do what I need and being comfortable with a period of quiet and calmness as part of my daily routine. If all adults did this maybe they would be less childish!
So each afternoon, when I have the chance, I will be pausing with my favorite nap-time pillow and blanket. I will be taking the time to do what I know I need to do to be the best me. Shhhhh...