How sour he seems. Compare him to his predecessors: Carson was all midwestern charm, with unreadable yet mannerly reserve; Steve Allen was almost as smart as he was certain you thought he must be, but he was cheerful; Parr was a nattering nutball covered with a rich creamy nougat of ego, but he was engaging. Letterman is empty; he’s inert; he stands for nothing except disdain for people foolish enough to stand for anything - aside from rote obesciance to all the things Decent People stand for, of course, all those shopworn assumptions passed around in the bubble.
This posture was fresh in ’80; it even had energy. But it paralyzes the heart after a while. You end up an SOB who shows up at the end of the night to reassure that nothing matters.
Read it here.