I think you have really great content, to me the point about selecting categories is so important because when I follow people I really want to see the same area being discussed, as well as having some sort of niche to bring diversity and draw people to your own unique view. Regular posting as well but keeping in mind providing new and valuable content. This is what I am trying to do, I am still a minnow though so I have a long way to go. I am a bit concerned about mentioning whales because unless it is relevant it feels like riding someone's coattails to me.