I too have watched it all on catch-up and gradually the appeal for me dawned on me.
Hollander's character is so like my OH, who was also a scientist/doctor with that slightly rigid measured approach to life - a bit lacking in spontaneity and wanting everything done by the book. He was also a very anxious man who would issue dire earnings to us all at every turn. Above all else, he also had an off-the-wall wit and humour, making subtle jokes that seemed to come from left-field.
But, unlike the Hollander character, he was a warm and loving father, always praising the girls and boosting their confidence.