Haha... well, I am an only child and when I was little I wanted an older brother (which of course was impossible the moment I was born unless my parents decided to adopt an older child), so they were "brotherly", I guess. And I was kind of the shy nerd kid at school and didn't have a ton of friends, so I do remember imagining them with me at elementary school kind of trying to build my confidence and be goofy. I was on a steady rotation of A Hard Day's Night, Help!, Magical Mystery Tour and Yellow Submarine movies growing up so that was sort of the base personas, their most pure and simplified selves. I guess it never really went away though -- they stopped being my imaginary friends, but as a teen I struggled with depression and they were a huge part of pulling me through it, and even today during difficult times I tend to turn to a George Harrison record before talking with another actual human. They still keep me grounded and are probably one thing I'll never "outgrow".