Conan O' Brien is at his peak right now. He owns his show and is doing exactly what he wants every night. Plus the documentary "Conan O' Brien Can't Stop" recording his tour hits today.
But Conan was always great. If you want proof here's a series of clips form 1996 where he tracks down the legendary "Grady" Whitman Mayo. In college we became obsessed with Grady so this hit us right where we lived.