Am I the only insane person that's having a lot of fun just messing around with portals, firing them in the strangest positions and looking through them? This is highly addictive...
Agreed. There's great novelty value in looking through a portal at yourself for some reason! The fact that you can also fall from great heights without problems is fun. One of the acheivements is to fall from 3,000 feet or something (or was it 30,000?!)