Mastery is an endless pathway that you can use to stay motivated regardless of the work you do. A barista could build further expertise by learning about different recipes of coffee. Or about the rituals around coffee in different parts of the world. And become a storyteller who tells a new story involving coffee to a customer. Maybe you could have storytelling sessions about all the interesting people who love coffee. The day you can discover that the opportunities for mastery in your field, whatever that might be, is really endless, you will stop dreading the beginning of the work week.