I turned 12 in 1980 so remember it well. The comedy - Ben Elton, Not the Nine O'Clock News, The Young Ones. Adults hated it or didn't get it. The music: The Jam, The Communards, Bronski Beat, Bananarama, Frankie Goes to Hollywood, Wham, Madness. I wasn't a fan of Boy George/Culture Club. The TV - Channel 4 starting, Brookside & everyone swooning over Barry Grant.
Fashion - big hair, T-shirts with massive logos like Relax. Pixie boots. Lots of denim and leather jackets.
Mass unemployment, people hated Thatcher, the miners strike then as I went to uni, the boycott of Barclays Bank due to apartheid. As others have said the nuclear threat hung over us, the brave women at Greenham Common trying to stop nuclear weapons being based here. Was it also the decade of Swampy trying to stop new bypasses being built?
My DDs adore the music of the time. It was a strange time to be young, but an exciting time. By the end of the decade I had a job, I wore a suit and people had "portable" computers (you needed massive muscles to actually carry the thing). Data was on 5.25" floppy disks. God, I am showing my age!