Actually, if I could deliberately sit down and write a pop hit, all my songs would be pop hits! Let's put it this way. I play what I like to hear. And sometimes I like to hear something poppy, and sometimes I don't.
I've seen novels that have grown out of one story in a collection. But it hasn't occurred to me to take any of those stories and build on them. They seem very finished for me, so I don't feel like going back and dredging them up.