Which is more important for you in twitter, The person you followed or the person who followed you? Honestly, Followers is more important for me, the more person that followed me the more I become happy with my twitter.
I think the person who followed you it is more important.
If you're wanting a vanity metric for popularity, this is what you may deem as more important. Followers - if you're looking to grow your audience and get more eyeballs on your post, this is what you may deem as more important.