Shifts - done them on and off since I was 25, but in broadcasting/streaming, so not a hard environmment like British Steel or where my dad worked - Visqueen, I always had a coffee in my hand at 3am covering the NFL or BBC output, not freezing my @rse off in a big noisy factory. Early on it was fine, loved the time off and as people have said, mooching about during the week when it was less busy, could go for beers on a weekday in London and sleep late the next day.
Done a few stupid/crazy patterns, 12 hour shifts - 7 on/7 off was one, so you do 7 nights in a row one week (84 hours overnight - nightmare) then a week off but you're wrecked for the first 2 days off.. it starts to catch up with you, sleep becomes difficult to nail down (used to have a large whisky after the last nightshift at 9am before bed and always woke around 2pm, feeling like cr@p). Ended up ditching them and going freelance as a producer for Eurosport, until covid ...meant I had to do some more of the dreaded nightshifts after not working them in years.... it kicked me in the b@llocks to be honest, I was absolutely wrecked by 5am, keeping yourself up over night is a younger mans game.
I quit shifts when I realised its medically against how the body operates - mood swings, alcohol use, depression. Sleep deprivation is a very serious thing. The moment you don't feel good, get out of shifts.