1) All the women are house-obsessed nags.
2) All the men are hopeless. And can't cook. Except for one, and he's gay.
In more detail:
WILL AND ED AND EMMA AND GEORGE
At the heart of Ambridge is a caravan. In it, young Emma Grundy is bringing up boiby Georgie and scheming for a better life. For her, this means a flat and flexitime at the cafe.
She was married to Will, but then left him for his brother, Ed. Ed is the only man in Ambridge not to realise that Emma is *completely fucking bonkers*.
Emma has recently left the caravan, after a CD rack fell on George while Will, Ed and Emma were fighting over who was the best parent.
Clarrie Grundy has been suffering since birth. A member of Opus Dei, she punishes herself by selfless marriage to Eddie Grundy and servitude to his 400 year old father. Eddie isn't speaking to his son Ed over the Will/Emma meltdown, despite the fact that Ed is now raising organic cows at Willowtwistle Cottage, something that Eddie is secretly proud of.
Eddie is currently working on a range of erotic gnomes.
The spiritual centre of Ambridge is Shula, descended from Joseph of Arimathea. Originally, a pensioner played teenaged Shula. 40 years later, she's still there. Shula is The Nicest Person In Ambridge. She forgives her vet husband for his gambling addiction, more concerned about whether or not her young child will get into Organ School and win the soapbox derby.
She's best friends with Usha, the lawyer, but hates that she's going out with the vicar, because, well, after all, Usha's a bit foreign, really.
IAN AND ADAM
Ambridge's only gays. They first kissed in Adam's strawberry growers, and now share a house together. As none of the scriptwriters has ever met a gay, Adam and Ian behave oddly.
In an attempt to introduce conflict, Adam and Ian briefly argued over household chores, before getting a cleaner. Foolishly, they hired Emma Grundy, who leaves the caravan twice a week to lament on their Japanese effect scatter cushions.
Adam and Ian's only habit is long evenings in their outdoor hot-tub. We frequently hear them earnestly discussing stawberry yields in it. Seriously. That's all they do. They honestly don't shag.
A drag queen.
Also a drag queen.
No one can quite remember what he's for.
Played by Tamsin Greig. Fabulously, but very occasionally.
YOUNG TOM ARCHER
Referred to as "The Sausage Baron of Borsetshire" without even a smirk. Had an affair with the manager of the local supermarket. His sausages are no longer organic.
The only teenager in Ambridge ever to try drugs. He immediately suffered brain damage and became a non-speaking character.
JOLENE AND SID
Manage the pub. Once heard them having adulterous sex in the shower, which quite put me off my spin class. Jolene has a daughter called Fallon. Brilliant.