(via (Quora) Answered by Jake Gerber, Musical Session Player
Put more succinctly : his playing is friggin BRILLIANT !!! I wish I was getting paid for this answer. In any event … I’ll commence with this. Anyone that doesn’t believe Paul put everything he had into Georges songs is mistaken. Paul took great pride in respect to everything he played. He upped the ante on three of George’s songs I can think of, two of which are on Abbey Road, the third on Revolver…
Paul’s playing on “ Something “ could be studied in a music theory class in university level. The first time you hear the song played through a proper playback system ( vinyl ) where you can actually hear the bass, you might think Paul was overplaying, there’s a lot of movement going on, and the songs a ballad which in popular music are rather restrained in respect to the bass lines, if indeed it even actually has a dedicated bass line per se…
Every Moment Has A Song 