I almost never watched him until COVID hit. Colbert, as well as Trevor Noah at the time and Seth Meyers really improved their shows during and after COVID.

They all got much more relaxed and made the shows feel much more authentic. I think Colbert has actually swung the most back towards "professional", but he still general brings a more relaxed vibe.

Good, not great. The openers to Meanwhile were always entertaining, however. John Batiste was a gem, stopped watching after he left (unrelated).

He was way funnier when he was a conservative before he switched parties.