Even the "bad" stuff can be good. You get shot down in your space truck a few times by the same CMDR. You make a note of their name and so begins a rivalry, a vendetta that spans the stars. A humble trader by day, pushed too far by one man he snaps, and embarks on a bloody crusade for vengeance! It's like your own personal storyline unfolding around you. Or you hear about all the stuff going on in Lave or whatever and you have to alter your route in response. It's organic, it shakes things up. You get NPCs at USS talking about "Thank god I escaped from that terrorist, GEEZER MATEY", well having an imperial clipper sniping people at a station could have the same sort of context but it's real player generated content.