Great question, eh ....!!
Like Tom, GC reminds me of the wonderful opportunities that being Greek has offered me. GC re-affirms this in that this is definately a place to share ideas, learn new things without the fear of 'looking stupid' or the like.
GC has also helped to shorten the miles between those people who are gung-ho about Greek Life and love to show it (especially the Canadian GCers!)
GC has also taught me that there are various opinions, and although I may not agree with them ..... I sure can post a constructive reply if I like!!