Having just watched the complete set I would pick out late 2nd series to early 3rd as being the era of near perfect comedy, an enlightened zen discovery of inner mirth. I watched it 39 years ago and of course have completely forgotten most, except for the recently repeated sketches. It is the rest which is particularly polarising in comedic taste. The reliance on cross dressing and falsetto delivery can be chaffing to the soul or liberating depending on how much it is embraced. I cannot explain why sometimes salty tears of ribaldry flowed whilst at others heavy lids of boredom. It was probably the most significant landmark in modern comedy and 50% of it is hysterically brilliant. What more can you ask?