I was surprised by the first series of the original "Reginald Perrin" sitcom. Not only was Leonard Rossiter great in it (which wasn't exactly a surprise) but the scripts and the style were surprising and fresh, even for today's standards. These daydream like sequences and the depiction of Perrin's boring and repetitious work life (which reminded me a bit of "Groundhog Day") were great and seemingly innovative for its day...compared to shows as "Open All Hours" or "Rising Damp" which were pretty normal, straight shows.
Series two lost a bit of that strange nightmare-like quality...but that's ok, because these styles would have been a repetition of the first series and therefore become annoying.
Overall I liked the show. And I wouldn't have thought that a seventies show could surprise me with its style. I only suspected a good Rossiters and likeable scripts with inoffensive but good jokes. What I got in the end was a expansion of my (British) comedy horizon. Great!
(I'll soon check out both shows of "The Likely Lads" and "Dad's Army")