+10 to this. The signal to noise on Twitter is terrible.
Pretty sure I'm using it "wrong", but my likelihood of following someone on Twitter is generally inversely proportional to their number of tweets per day.
Of course, there are always counter examples, famous people that don't tweet at all, or people posting dumb shit and not getting followers. That tweet to follower ratio has some variation. Quality matters too and it helps if people have a following outside of Twitter.
But still, I'd say that your likelihood of following someone is not representative of other Twitter users.