People love to be a part of a community.
What exactly constitute a community changes from one person to another, but most people will agree on the functionality: it should provide you with something you need.
· For some it’s a sense of belonging.
· For others it provides tangible benefits- knowledge, tips.
· For others it’s a network itself.
Regardless of the motivation- it seems that people like to belong. What people aren’t very good at is creating a community.