I always used
3 minutes=runny yolk and some inner runny white
4 minutes=runny yolk and cooked white
5 minutes=some outer cooked yolk and well cooked white.
I love soft-boiled eggs, but they're such a hassle to make. Scoop the egg onto a slice of torn-up bread with butter, salt and pepper. The runny yolk soaking into the bread. Aahhh....