The issue of building your persona around darkness is that after a certain point it becomes ridiculous. An overwhelming sense of nihilism, an abhorrence of any kind of salvation and an unwavering fascination with misery can be profound, for a while. Those who can sustain careers built around gloom, the likes of Sun Kil Moon, Scott Walker and Nick Cave, know that you have to allow some light in. Because if you don’t and you’re unwilling to go the extreme, á la Ian Curtis or Richey Edwards, then all you doing is insincere posturing which will inevitably slide into unintentional…