Portal 2 Collection of Thoughts

(spoilers ahead)

Portal 2 has a story worth some more analysis: collected thoughts from around...

Greek myth?
"Scholarly fans claim the plot is a Greek myth. Prometheus and Epimetheus created humanity, but Epimetheus (Wheatley) was useless. To help, Prometheus gave humans fire (GLaDOS gave Chell the Portal gun) and was cast into the pit of Tartaros for it. Signs? Elysium was a heavenly field of reeds, and P2 ends in a field. The depths of Aperture have 'Tartaros 9' on the walls. And the painting of Caroline and Cave shows Aeschylus - writer of Prometheus Bound."
-http://www.computerandvideogames.com/311288/portal-2-10-incredible-secrets-you-might-have-missed/?page=2

GLaDOS cares for Chell
This video I found presented some great ideas on Portal 2's story.

About the lyrics to the ending song, "Want You Gone": The first time, based on your past experience with GLaDOS' vitriolic humor, you would think she despises you but masks it behind clever language. But it's conceivable that she actually cares for you:
--
Well here we are again
It's always such a pleasure
Remember when you tried
to kill me twice?
Oh how we laughed and laughed
Except I wasn't laughing
Under the circumstances
I've been shockingly nice

You want your freedom?
Take it
That's what I'm counting on

I used to want you dead
but
Now I only want you gone

She was a lot like you
(Maybe not quite as heavy)
Now little Caroline is in here too // Caroline is still here? possible! GLaDOS then fake deleted caroline
One day they woke me up
So I could live forever
It's such a shame the same
will never happen to you // could be cruel, saying I will die eventually, or have a tone of honest longing

You've got your
short sad
life left
That's what I'm counting on // could be counting on my life as a bad thing, or that I should live it up!
I'll let you get right to it
Now I only want you gone

Goodbye my only friend
Oh, did you think I meant you?
That would be funny
if it weren't so sad // it's true! I am her only friend
Well you have been replaced
I don't need anyone now
When I delete you maybe
I'll stop feeling so bad // shown as "[REDACTED]" on the credits screen, suggesting GLaDOS' conflict

Go make some new disaster
That's what I'm counting on
You're someone else's problem // continued conflict within GLaDOS
Now I only want you gone
Now I only want you gone
Now I only want you...
gone
--
The Opera's singing in Italian - the words being translated into "my love" and stuff like that clearly show sympathy for Chell - strong indication that GLaDOS fake-deleted Caroline.

Idea: Chell is GLaDOS's daughter. GLaDOS was Caroline, Caroline looked really close to Cave Johnson in that secret painting, Caroline seemed really excited with Johnson in that one record about lemons (she got really excited), the bring-your-child-to-work day posters, the "by Chell" label on one of the posters (meaning Chell was the daughter of someone at Aperture Laboratories)...
when Wheatley makes jokes about Chell being adopted, GLaDOS remarks, what's wrong with being adopted anyway? (especially ironic because GLaDOS earlier on teases her about having no parents, during the time before GLaDOS recovers Caroline and her memories)

GLaDOS continues to antagonize Chell right before releasing Chell so as to protect Chell from knowing the truth - that GLaDOS's conscience is Chell's mother's conscience. To think that the mother would put her child through so many tests... cool ideas.

Another interesting perspective: http://minecraftthekingdom.forumotion.com/t987-portal-2-story-line-contains-spoilers

More rambling
Where do you draw the line for identity? Some might say GLaDOS is Caroline, while others might say Caroline is only a part of GLaDOS, or that Caroline is distributed across the laboratories and the turrets (hence the singing at the end)...

The moon scene was alluded to in the painting in the room you woke up in.