I think I probably have to do some schoolwork before starting Portal 2... but it's really tempting to just start it right now. But I won't. Probably.
Also, the ending of Portal was really great. Though I had to look up what she says for a lot of that ending part, because I was too focused on running around doing shit to hear all of it. I did hear her taunting me about how my poor Companion Cube wouldn't be attending my hypothetical party, because I murdered it.