I really think Eddie Albert was an underappreciated ingredient of the series. One of the things that made Oliver Douglas so great was that he appeared to have no sense of humor whatsoever, and after a while one suspected the characters got a lot of pleasure just provoking the old grouch. And God...
The editing rhythms of the show were quite unique as well, with Eddie Albert's lines frequently cut off in mid-sentence as another character injects some absurdity to further complicate the situations.