After 33 years as a clean-shaven late-night host, Letterman retired last summer
and was replaced by Stephen Colbert
. In a recent interview with NBC News
' Tom Brokaw, he admits that he rarely thinks about his past life on TV. "It’s interesting, I thought for sure I would. And then, the first day of Stephen’s show, when he went on the air, an energy left me and I felt like, ‘You know, that’s not my problem anymore,''' he explained. "I’ve kind of felt that way ever since. I devoted so much time to the damage of other aspects of my life. The concentrated, fixated, focusing on that. …It’s good now to not have that."