I like being with other people who enjoy the same things I do. It took me about a year to get comfortable in the guild I'm a member of. When you join a group where everyone else knows everyone it takes a while to learn names and know people. I think people give up too quickly on most groups.
The things I like about being part of the group:
Give-and-take table - I get all my quilt magazines from there. Take them home, read them and bring them back for someone else to enjoy. There is also fabric there that I take sometimes. It's also a good place for me to pass things on.
Show and tell - See what others have made and acknowledge their accomplishments and sometimes show mine. A real feel good time.
Demos - I have learned a lot of new techniques.