[WesolyKubeczek]

> "I just really want to be part of/build this" factor. People with that make for excellent teammates.

Not always. You want to be a part of something/build something, and then you want to build it YOUR way. Or you see an obvious hole and then an ugly battle between your ego and that of the chief architect ensues.

Also, there may be cases when you want to be a part of something, meet your heroes, and then it all goes pear-shaped. Because you shouldn't meet your heroes.

And sometimes it's better to have mercenaries who don't necessary believe in the same thing as you but care a lot about their own reputation and take pride in having done a good job.