The following quote is from Alex Bogusky, the chief creative officer of ad agency Crispin, Porter + Bogusky and can apply to what kind of writing you're doing--or anything else in your life. He was responding, in an interview, to what he would suggest to young people getting into the ad business, but I think this is equally important to consider periodically about your work:
"At first, you have to just get started and learn more about what it is you really like about the business. Sometimes you talk to young people and they think they want to be an art director, but you realize they are more of a writer. You talk to an art director and you see that the only time their eyes begin to sparkle is when they talk about the toys they make. And you realize: that's a toy maker. And yet, there's probably a lot of pressure at school and at home to do something because you're good at it. Yeah, you're good at that, but your eyes light up when you talk about this. You have to discover that for yourself, and you can discover it at any place. Be open-minded and just slide toward those things that give you joy."
When we're young, the pressure usually comes, as he says, from school and home. When we get older, it comes from habit and complacency--all hard to resist, but resist we must!