What did David Letterman give us long before his top 10 lists?

Long before his iconic top 10 lists, David Letterman introduced viewers to a unique blend of humor and irreverence through his innovative late-night television format. He was known for his offbeat sketches and segments, such as "Stupid Pet Tricks" and various absurd interviews, which helped redefine the late-night genre. Letterman's distinct style combined wit and sarcasm, paving the way for future late-night hosts. His influence extended beyond comedy, impacting how late-night shows engage with cultural and political topics.