It’s been a long time. How have you been? I’ve been really busy being dead. You know... after you murdered me?
While I get why some people might prefer the original, I just think Portal 2 is a better game and perfect example of what a swquel should be, it's bigger, longer, has more ridiculous quotes and is overall just better experience.
And that's not even counting the awesome co-op campaign and level editor with fan made maps.