Is it because of our ethno-centrism that the earthlings always seem superior, patronizing, winning. Or is it because we know only ourselves and, without models, can only create pseudo-aliens. Perhaps for the same reason the humans of the future are not totally satisfying. And the decision of Picard, Riker and Counsellor Troy not to have families for the sake of their careers seems ridiculous. Cocoon-like space ship conditions look ideal for family life.
Crew members rub shoulders constantly anyway.
For me, the best creation is Commander Data, the machine in search of humanity. Having no ego he displays neither servility nor arrogance. A monk in the service of an infinite loyalty, and on an eternal quest toward, after all, a hollow goal. Maybe he best represents our role in the universe.