correct_2_horse_2_battery_2_staple. In my experience it doesn't take long to memorise the words.
I have two passwords I know off by heart, my password manager and my gmail (just in case). I also capitalise a certain letter in each word, but that pattern is in my head only.
I am of course lazy, so I use biometrics on my phone/tablet/laptop to minimise the need for entering my password. But I wouldn't if I still worked in a high risk industry.