I think it also depends what genre you're into in terms of story. Do you like a Post-apocalyptic horror depicting life after a nuclear war and people struggling to make a living in a damn near endless desert of the ruins of Northern California and Southern California, be the one to save the wasteland or bring it through complete hell and destroy everyone in your path ( a scenario that I see as unlikely) or do you like a good story that varies upon every game that incorporates the issues of corporatism, evil empires, gods and their hatred of humanity, insane psychotic clowns that simply want everything to die and end, magic beings and people who can utilize that power, civilization as it climbs to its top and falls to the bottom through natural disasters or its self, interesting characters with great backstories of those people enough that you can sympathize with them.