Power
You're the owner of the piano shop, so when you walk in and that little bell above the door jingles, you suddenly go from being J. Average to being the boss. Within your store, nobody tells you how to live your life.
You want to dance on a grand piano? You can. You want to delegate the boring stuff to somebody else? Go nuts. You want to hire a new employee or fire an old one? It's your call. You're in charge of every detail, from what you order to when you're open to how you decorate the display window.
Some days, you may feel like doing nothing—and there's a chance that you could actually do it. After all, you don't have a boss to report to. Provided that there's nothing important that needs doing, like paying property taxes or ordering in extra Christmas carol sheet music, you can just take the day off. Who's going to fire you? Nobody, that's who.
That kind of power can really go to your head, so you'll want to be careful. Nobody likes working for a jerk, after all, and customers who aren't treated respectfully will take their business elsewhere. Even within your shop, you'll have to be good to the people around you, because they're the ones who will make or break your financial year. But other than that little detail? You're in charge.
You decide how the store is run and how often you want to come into work, and the only thing that can boss you around is a declining profit margin. And even then, if you want the store to go under, it's your decision. You're the boss.