There are three types of goals when looking for a career.
1. Doing something you love
2. Doing something the world will pay for (that they value)
3. Doing something you can become the best in the world at
Most people accomplish one of these, and land in a career for the rest of their life, but the people that you know that are really happy have found the magic place where they are doing all 3.
It is tough to find, but if you ever do, hold on.