I write across genres so I see them, more often, as complementary instead of separated by boundaries.
One of the reasons I write in different genres is that I get to have the feeling - even fleetingly - that I'm not just writing like Baggott again. I can escape myself.
Each genre has something to teach me about the others. Not all the lessons are transferable, but many of the most important ones are.
I don't have a favorite. I need different genres at different times.
Being cross-genre, you can encounter an image and decide not only how to best express it but what form would express it best.