I am clearly biased. After all, I teach philosophy for a living. I went to University and graduate school in philosophy. So, I am likely to be fond of the humanities in general and philosophy in particular.
But, I have to say, more than fifteen years after I graduated, I almost daily come back to some question, work, discussion or issue that I was introduced to in some humanities class, whether humanities itself or theology or Russian literature or philosophy. The fact that I still feed on those morsels says something to be about the human—not the economic or employment or market—value of the humanities. After all, we are humans, right?
For some of those other values, I highly recommend Martha Nussbaum's, Not for Profit: Why Democracy Needs the Humanities.