GladOS was easily the highlight of Portal, her quotes are pure gold.
"Remember when the platform was sliding into the firepit and I said 'Goodbye', and you were all like 'NO WAY!' and we pretended we were going to kill you. That was great. Someday we will look back at this and laugh. And laugh. And laugh."
As for the end battle, if you took your time with that and went at it slowly, she would taunt you with some of the best lines I've ever heard.
"It's all on file here, you're unlikable, liked by no one, extremely hard to like. Also, you are adopted. Haha."
:D








