A lot depends on your goals and expectations for writing. If you want to make a living as an author, you'll need to write stories that appeal to a broad audience. That doesn't mean you have to follow trends - my experience with followers is that unless you're really fast or extremely good (and lucky) you usually are too late. Alternatively, you could try and anticipate or even set the next trend. To me that seems to be an exercise in hubris or self-delusion. If you have the power to set trends, you're probably not an aspiring author. My advice would be to write what you like to read. Chances are you're not alone - after all you read it, which means it's available so someone else (or several others) probably like it too. Also since you read it you're familiar with the elements that make a good story in that genre, be it plot types, settings, character development or whatever. Finally, and perhaps most importantly, you're more likely to enjoy your writing if you do it in a genre you like to read. If you're not having fun, then you're doing it wrong. The cold hard truth is that most people who write, including those of us who are published, don't make our living writing. Nearly half a million books are published every year in the US and the average book sells less than 500 copies, which means that for every book that sells a million, there are more than 2000 books that sell nearly zero, i.e., most books don't make much money so make sure you're enjoying it.