It is funny to compare C.K. between his absurdest past and his satirical present. There was a moment, and I'm sure it was when his first kid was born, where he shifted gears completely and became this amazingly talented workaholic.
Also, crdiet to the animators on this one too. The visuals really work well with the joke and it's timing. Dr. Katz was a pretty good show that too many folks have forgotten about completely in the wake of Home Movies, which was amazing in it's own regard.