I'm sure I have lots of reasons, but being that it's 3:05 AM in Hawaii, I can only think of these...and because you practically threw the spotlight on me, I love GreekChat because:

1) It makes the work/school day go by faster.
2) GC allows me to interact with people I otherwise probably would not have 'met'.
3) AXO Alum. Read her posts and you'll know why.
4) Believe it or not, the gazillion HOW COME threads. I find myself reading some of them to my co-workers.
5) I learn more about different organizations, including my own!