"why do so many people want to read such extreme angst all the time?"

That one seems pretty popular across all fandoms and shipping types, though. Of course, with SPN it is odd since the show itself isn't exactly grim (or wasn't in it's first season, which is admittedly the one I'm mostly familiar with), and despite the unusual circumstances the boys grew up in, they never seemed dysfunctional, isolated or even close enough to believably have an incestuous relationship. Has she found many where the relationship was the source of angst?