The goal is to find what enriches your own life while contributing to the greater good of the group . . . They just do. Even a quick glance makes it obvious that there is no one ideal community. They all have a focus. Some are militant environmentalists, some are not.
Every community is different.
The one thing I found most intriguing about the Art of Community was how often those in community talk about how crucial conflict management is. Those who appear to be most adept at living in community seem to be aware that most of us grow up lacking the skill to disagree respectfully with someone with a differing view without being mean or harmful. In some way, it makes it seem more precious that they know what they expect from community and are willing to make it possible for others to have the same expectations of them. The Net-Etiquette approach is nice. But it doesn't help a whole lot if you haven't had the opportunity to practice conflict resolution.