I've been mulling over this very topic lately. I share the idea that our accounts can be a business; more than a business, I'd call it a personal brand, and I'm managing my account with that approach.

I do believe that a personal blog should have a certain human touch, and a person isn't just one thing, one interest. You can have several, and it's okay to explore and share them. I think in a business, this would be called humanizing the brand.

That's why my idea (it doesn't have to be everyone's) is to primarily share my main interest, which is video game development. But on the other hand, I like to share a few other interests, such as calisthenics, soccer, motivation/reflections, etc.