Nothing makes me happier than a good conversation. As a matter of fact, I will soon be launching a site dedicated to holding great conversations called Atticus Park.
I like to say that it is a place where the Mind can Play...a place where your share your opinions, instead of imposing them.
Psychology...more specifically, Behavioural Economics. If you have a chance, look up Dan Ariely, he's absolutely fascinating!
Great conversations (as mentioned above)