The thing that is prioritized when following someone is that if they are interesting and they are posting contents from which I get to learn something and it should be a little interesting as well.

Each user has their own criteria and after following few of them it really attracts to go through the posts of the selected ones.

The way of presenting a content, really maters. 

The users who engages with the people who comments in their posts is another attraction that leads to a nice communication to build up.