I thought this question might lead to some interesting discussion and recommendations. My choice: The ending bit of the song, when John Lennon is practically flaying his throat screaming, is harrowing. It seems pretty rare for any artist to write something so direct and emotionally raw. I would like more well known artists to do something similar. I'm a little tired of the unpleasant emotions being so buried and coded in mainstream songs. It's like that ridiculous societal taboo against getting too "heavy" in social situations applies to music too and I love songs that say, "Fuck that. I'm going to give this depressing shit to you straight." Also, the way he's going in on the vocals is something special. A lot of artists seem to hold back the vocal, as if they're afraid of it hitting to close to the bone. Lennon lets it rip in this song, which is what makes him one of the all time greatest rock vocalists. McCartney might have superior range and pitch, but he never recorded a vocal as impactful as the one is this song.