Re: What I have read agents don't want
Most writers have more than one idea they would love to write about, more than one plot and set of characters they could fall in love with. Choosing from among those the one that is the most likely to sell makes sense. Writing something you don't really want to write because you think it will sell is a very poor idea.
But I agree with Culhwch: just because you like it doesn't mean it's good or that it will sell. You have to be able to communicate what it is about the story and characters that you love to other readers.