I mean, Tony Tommasini has a PhD and was a former college professor, and I find his music reviews for the Times damn-near unreadable. Then again, that's just my opinion. If this thread has shown anything, it's that the more one tries to quantify what is "essential" for a reviewer, the more it falls apart. One needs "experience" in theater -- unless one doesn't. One should have an advanced degree -- or not. It all comes back to the fact that there are many unique characteristics that contribute to good criticism.
"You travel alone because other people are only there to remind you how much that hook hurts that we all bit down on. Wait for that one day we can bite free and get back out there in space where we belong, sail back over water, over skies, into space, the hook finally out of our mouths and we wander back out there in space spawning to other planets never to return hurrah to earth and we'll look back and can't even see these lives here anymore. Only the taste of blood to remind us we ever existed. The earth is small. We're gone. We're dead. We're safe."
-John Guare, Landscape of the Body