It’s fun to write about sunshine and rainbows once in a while. But these stats say it clearly: Most of the time you should write about the “hard stuff”. Instead of the “5 Ways to Make Money by Painting Pictures of Unicorns” stuff. You get the idea.
Oh, you should, but it's not always easy to bleed words like that, Kirsty! Plus, one great piece of advice I've read from others is to keep some of your best stories for later down the road. By then, you will have refined your writing style, earning the experience to give your best stories a stronger voice and make a stronger impact :D