I'm a little confused. Are we defining our purpose/mission, or are we answering the question, "what would make me happy?" and taking anyone else out of that equation? Because they are two different things. My purpose/mission involves making a safe, healthy, home for my family. But what makes me happy? The thought of sailing my own boat on a lake, surrounded by beautiful trees. A cooler of beer, some sandwiches, maybe some fruit.
Most of the other things that make me happy involve other people, usually naked ones.