Not sure where Bungie is trying to go with the story (not sure they know either) but I think it would be interesting if you could choose to build your guardian with "Light" or "Darkness". I understand you are fighting the darkness, but most believe that we are actually fighting for the bad guy at the moment. So in order to get gear with darkness it can either be looted, or bought from a "black market" which sells all gear and weapons for strange coin. Just an idea. Like I said, not sure if it would have anyway to even fit into the current story, just thought it would be nice to give the guardians more of a choice.