and here's another very good post worth checking out by @arbitrarykitten, "Find and Embrace Your Steemit Voice" and write about what you know, what you love, and what you'd probably even write about for free. Eventually, the rewards will start to work out on their own! :)
Show me no money!
Yes, you read that right ;) What would you write about for free? What subject are you so passionate about that you can talk about it all day long and not grow tired? That, my friend, is your Steemit niche.
Your passion will show through the page to your readers. They can tell if you love the subject, they will be able to feel it when reading your work.
Great job showcasing others! And thank you :)