They all speak about the same things, but from many different perspectives.
For example, I learn a lot about talking with God and how God works by listening to Joel Osteens sermons while driving.
He starts them by saying this:
This is my Bible.Works for me.
I am what it says I am.
I have what it says I have.
I can do what it says I can do.
...
God pours His Grace on all of us, so I imagine everyone has at least something of value to pass along.
However, I find that listening while suspending judgment is hard for me to do, but Im getting better at it.
Try substituting Andy Woods for the Joe; Osteen listening. Osteen is not a God ordained Teacher. His prosperity gospel is not the Gospel of Salvation, for it appeals to the carnal nature not the spiritual.