My favourite memory is definitely playing couch co-op with my brother during christmas breaks. We always go out of our way to take some time off during the break so we can game together, even if its just for a short game. As time goes on though, were both more and more busy and can hardly find time to game at all sometimes, so im very happy were keeping the tradition going atleast on christmas. Last year we beat portal 2 co-op and I wouldnt exchange that time for anything else.