I think the "Secret" on Steemit is that there is such a wide range of creative expression here that you can post about pretty much any idea that enters your head... and you'll discover that there's a sub-community here that's actually interested in it.
One of the things I really like is that I do NOT feel like I have to go "popular topic hunting" in order to produce content that'll be seen.
That is exactly what I think too. Sometimes I know that people can get caught up thinking will it make money? When really they will never know what earns for sure so should just post what interests them.