I don't follow a bunch of different demographics on twitter too anymore. I can notice them via subscribed or not lists, and hashtags that I can explore though.
I also noticed that I pay more attention on my big 3 that I value these days: #slow
Trusted people in my network
So my big 3 tend to be diverse, from many fields as sense-makers can have also a multi-faceted view from the edge [thanks Dan for the expression via the TrustNet list :)] and as they are also generalists.
As I've revisited recently my learning journey on the web via a post, I also mentioned in it this interesting post on LFR [http://www.thenetworkthinkers.com/2011/05/focusing-attention-via-twitter.html
]. I see and like that approach to future scanning and discovery too. And I understand better your approach as you commented on the post few years ago, +Angela blogbrevity
. :) Did you change your approach since 2011?