Players start or join a guild for many different reasons. Friends creating a guild together, an Elder Game player joins a progression guild or players band together for PvP. I’ve even seen one-player guilds just for the vault space. Whatever the reason, guilds can be the one thing that keeps a player coming back.
As a member of an MMO guild, contributions to the community are a direct reflection on your value to the team. How, what and why you contribute to the group is seen by all members and distills into a single statement.
When you are not around do the members say:
“It would have been better if you were here.”
This is a undeniable indicator of your contributions.