When I did 'Battlestar Galactica' it was the first time I really understood science fiction. That was a very political drama, but set in spaceships so people didn't really take it seriously. But some really fascinating things were explored in that.
I knew the profanity used up and down my street would not go over the air... So I trained myself to say 'Holy Cow' instead.
Acting in 'Star Wars' I felt like a raisin in a giant fruit salad, and I didn't even know who the cantaloupes were.