Since we are already at sharing personal stories: I follow only people who have a balanced follower/following ratio. I refuse to be interest in people who are not interested in me. The number of people who make postings that contain non replaceable information is ridiculously low, and I don't see the point why I should participate in non-reciprocal interactions. But I have a list of about a handful of people who's tweets I have to keep up with just because they are industry thought leaders.