A fellow student of mine is a marvelous lecturer in Philosophy. A number of us regularly get together to discuss religion in his dorm block, and he will sometimes walk in and give us random, lucid treatises on the philosophical ideas that relate to our discussion. He has a great way of describing highly complicated things.
This friend would be an awesome philosophy prof. He would love to be a philosophy prof. But he's not going to follow that path.
He loves to teach, but he has very little desire to publish. He's a true dialectician, but he gets bored with the publishing system of prestige and ladder-climbing.
One more great professor lost for want of a sane academic establishment.