The only thing that matters is what you want to write. Contemporary fiction sells more books, but most of the most successful movies in the last 10 years have been science fiction. People want SF - not just because it allows them to escape the mundane reality we live in, but because it allows us to explore topics that might be otherwise uncomfortable without having people get defensive and angry.
My vote is to write the story how you want it to be - whether its heavy or light on SFF or whatever. The most authentic work you can produce is true to the vision you have and your own desire as a writer. It's also the best writing you can do because it's tapping into your passion.
My vote is to write the story how you want it to be - whether its heavy or light on SFF or whatever. The most authentic work you can produce is true to the vision you have and your own desire as a writer. It's also the best writing you can do because it's tapping into your passion.