This is where I get into trouble.
I don't know a nice way to say this, so I'm sorry, but our opinions don’t matter on this one. Consumers respond to books in the same way they do Art, which includes stuff like music and television and movies. They just do. It's not up for debate or personal conjecture. New writers really need to understand this point because it affects everything we do, especially when it comes to managing expectations. It's like ignoring color theory because we like gray. Our favorite color has nothing to do with the fact that different colors trigger different psychological responses in consumers.
At the end of the day, we’re selling an emotional experience. How do we mathematically quantify why some people cry when others yawn?
For simple proof, ask yourself why you like one genre over another? I can rationalize about it all day, but the truth is: I have no idea why I like what I like, I just do. Readers are the same way.
This phenomenon is literally the reason we say:
your mileage may vary. For companies selling dish soap and lawnmowers and desktop calculators, their mileage varies practically not at all. The same actions typically provide the same results because, by and large, these are mostly fact-based purchase decisions. On the other hand, Art is way down at the other end of the spectrum, it’s all about emotion. And emotion is totally unpredictable.
I know I should probably just let it go, but it's one of those vitally important business fundamentals that might not be so obvious on the surface, and yet is central to strategic thinking, especially as the market continues to shift toward a pay to play dynamic.
eta: I think the discussion would be more beneficial if we could figure out a methodology to account for the emotional component (if it's even possible). Fashion, for example, is in the middle of the spectrum between facts and emotion, or rational and irrational consumer behavior. Fashion has a fact component, but it also reinforces self-perception, which is an extremely influential driver of consumer psychology.