Earlier quoted context omitted.
That's begging the question. Why is it fun?
Asking people why they like what they like is a pointless exercise. And generally, in my experience, it comes from a place of arrogance on the part of the person doing the asking, because the next phase is talking down about how the "reasons" aren't valid.
http://www.gamasutra.com/view/feature/129948/the_chemistry_o...
http://www.gamasutra.com/view/feature/131802/glory_and_shame...
Off the top of my head.