Stephen Colbert brought David Letterman back to his roots as a guest on “The Late Show” and asked him what he misses most about his time in the captain’s seat.

As Letterman had hosted over 4,000 shows, they talked about the good shows and ones they thought were bad and both agreed that it all looks different to the viewers and what they considered “bad” shows weren’t so bad after all.

When it comes to what he misses, it’s pretty simple for Letterman, he misses it all.