Lady Mary is a bit odd all round. She is supposed to be this successful, wonderfully attractive, spoiled aristocratic daughter, yet as TheOneLeggedJockey pointed out, she doesn't appear to have a social life at all. When she really needs her spirits lifting, she goes to the hairdresser. Once. You would have thought, at the very least, she would be insisting on regular house parties, that she'd be off to dances and house parties elsewhere, that she'd spend time writing to friends and meeting up with them.
Yes, I know they were living in the Yorkshire sticks but still, life would have been a social whirl for a young aristocrat like Lady Mary. Yet she seems to have no friends and the servants are her main confidents, which is ridiculous. No servant would have dared get into conversation with her boss, even if the boss were so inclined.
The servants also seem to be completely deprived of a social life. One single servant's ball in all those years. Nobody ever comes to see them, nobody stays with them while their own masters are away and they're on board wages, they never get to go do dances or anything else at other houses, the men don't even seem to go to the pub. Like so much else, this has changed from the early series, where there was more of an attempt to show different aspects of life downstairs. Now it seems increasingly to be about a little group huddled together, navel-gazing. They are strangely teetotal, too; you΄d expect the men to at least pop down to the pub now and then.
I kind of thought the opposite. The servants had way too much free time. In reality, they would have had maybe half a day off a week to go to church, and would have been working hard pretty much dawn to dusk every other day.
Also, the downstairs staff would have consisted almost entirely of single women, but in DA the numbers of men and women are about equal. I can understand why they did that from a dramatic point of view however.