The show points out that acts can have their gray interpretations, that evil can be acknowledged and even atoned for, and that even the most awful of villains is ultimately just a failed human being.

This! And also, how the show points out that those we fear as 'other' are really just like ourselves.

Stargate SG-1

I love that too, though I never got truly fannish about it.

Hi from another primordial soup fan!