What programmes that you loved have surprised you on rewatching?
I've just finished the first series of This Life and was surprised at how well it has aged for the most part (but so much smoking!). It was refreshing to see people with imperfect teeth and pubic hair and wobbly bums living in a grotty house share past their early 20s. I'm re-living my youth with the music too.
But Coupling! Oof! I remember it being really good but some clips I've seen (like making sex videos without consent and the way women are talked about) demonstrate exactly why I've never seen any re-runs.