I never really got too into the series to be honest. Was too busy watching Ghost in the Shell around the time I started watching this show and never really bothered to pick it back up after I finished with GitS based on your recommendation though I may have to.
"From the perspective of others I am part of the world, but when I observe the world from my perspective I am nowhere to be found. To observe is to create perspective. I can never cease to be the point of origin from my perspective. I observe that which is not myself. This is the first principle to find." - Ergo Proxy