That is a great question.
There are some communities here where the focus is on writing (creative/blogging/free-writing/stories), I guess those are my first instinct.
What we often come up against in Hive is right now our audience is small, but it will get bigger. As the Hive community grows, more people will create and engage with more communities, plus those hashtags will become more important :)
That said, if your goals are to profit from Hive, the flip-side of this is to make sure you write for a community that you have identified, rather than finding somewhere to put your content that you made.