These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Upstairs Downstairs
The Original Series
Crowning Moment of Awesome: "Guest of Honour", where King Edward VII comes to dinner at Eaton Place, a huge honour for the Bellamy family AND staff.
Ear Worm: The theme tune. Used on the radio 4 PM show with a section called 'Up Shares, Down Shares' and lead to a large series of remixes. Still possible to listen to here.
Growing the Beard: The first two seasons are much more light-hearted, and (with the exception of "Guest of Honour") much less popular with critics and viewers, than the third and fourth seasons.
Les Yay: Interpret Rose and Sarah's friendship as you will.
Acceptable Political Targets: Obviously, just about everyone is horrified when Spargo and Persie reveal themselves to be Fascists. Spargo ends up repenting while Persie goes off to Nazi Germany and becomes a kept woman.
Neville Chamberland, full-stop as a punching bag for forcing the country to appease Hitler.