Re: What makes a work commercial?
I tend to write the stories that want me to write them and not worry too much about the commercial aspect. I figure, if the one I'm doing isn't commercial, perhaps the next that comes to me will be.
I do have a feeling that the book I am shopping now sometimes falls into that "I don't think there is a market for this" category. Funny thing is I think it would make a good YA book (even though it doesn't have a YA character and I didn't write it thinking of it as a YA book).
It's a comedy about goofy superheroes, and I do think some agents might think of a book about superheros that isn't based on a comic book doesn't have a market. (Personally, I think of it as a comedy first and everything else second.)