With a few exceptions the writing was truly fantastic. Very seldom has two episodes of the same series been nominated in the same year for Emmies, as was the writing of the first year.
These writers took care to make Columbo totally believable. Small things too, eg, winning a raffle, bowling league, Columbo belonging to the Holy Name Society which was a very nice touch.
I didn't know Peter Falk was difficult but I am glad he was.