the inner geek that Mike P has when describing how John changes a pattern in his playing, how he says all players could learn from that , stuff like that is so awesome to hear someone say. It just goes to show how they approached their music, no formula, just doing stuff that felt right to them in the moment.
Another thing, as a non musician, hearing him and others isolate John's parts or whatever a video is doing, really opens my eyes to the components that make up the noise we hear as a song.
I think a lot of listeners hear the melody and obviously the lyrics and brains work for many along those lines. Kind of like easy beginner piano music versions of songs. The music/notes are structured along the overriding melody and simplified so much that you don't get the depth of what is being played by each instrument.
John's rhythm guitar parts that he went through - again, to someone like me that does not play anything- continues to amaze me because there is so much depth to it all vs what your brain (untrained) hears when listening to music.
I've said it before on here, I don't have the ear to hear individual parts easily, like unless a bass line is somewhat alone for a part of a song, I don't easily hear the bass.
Even in those early songs, generally called "simple or boring" by non-Beatle fans - the complexity was astounding, certainly for the times.