cocktail
What makes a cocktail or a dish good is having the right balance. Think flavors, textures, even colors. Put a little too much of that and the whole balance is off.
Humans are pretty similar. We are all a specific combination of different aspects of our lives: work, family, social life, hobbies, all of it. Too much of something and the whole balance is off. Maybe happiness is simply about figuring the right mix for you. And you are the only one who can do that.