in reply to
What's the secret of this community?
Another very important factor that's not yet mentioned, I think, is that you can customise almost everything.
You can use CSS to change the look-and-feel. You can select themes to have even more power of the way CSS behaves. You can select which nodelets you want to see and which you don't want to see. TIMTOWTDI: you can check for new nodes using the New Nodes link or by category by using the Monastery Gates, SoPW, Discussions, Cool Uses for Perl etc links.
There is the Personal Nodelet in which you can put links to nodes or even to other pages.
There is the home node in which you can say who you are in every way you want. There are the scratch pads which allow you to easily store notes, reminders and/or links on the site, be it public or private (and with the recent change you can have both public and private scratch pads!).