What you know, from the heart.

From JOI Design:

Many of us struggle with writing, we're not all like Simon Young who writes in his sleep. But I've learnt one thing, being honest is very interesting to most people. When you attend a seminar, the most interesting speakers are the honest ones who simply and eloquently talk about what they know from the 'heart'. The bad speakers try to follow a formula and give you what they think you want to know.

Who is a communicator you enjoy listening to and benefit from? Why?
What is it about the way they communicate that is effective, keeps you listening and makes you go back for more?