Pick the project you’re excited about, especially if it’s your first book. If you make money as a writer and you need money now, pick what makes the most money the fastest. If you make money as a writer and you don’t need money now, or if you write for fun but want to make money eventually, pick the one you’re excited about, because you’re going to get to the murky middle and a project you’re half-hearted about won’t inspire you to push through to the end.
