In my opinion the most important thing, whatever you write, is to think about what you are personally interested in. What kind of book do you want to write? The crime genre can be formulaic and one can experience pressure to be commercial, to stick to the guidelines of what a crime novel “should” look like. To follow someone else’s agenda takes the fun out of writing and it’s impossible to satisfy everyone’s taste regardless. That’s why it’s essential to stick to your own expression, to what you think is important and interesting.