Final answer:
The Beatles' first personal song not about love was 'Nowhere Man', a track from their 1965 album Rubber Soul, signaling a shift to more introspective and socially aware lyrics.
Step-by-step explanation:
The first personal song The Beatles recorded that was not about love is often considered to be 'Nowhere Man', which was released on their 1965 album Rubber Soul. The song marks a notable shift in The Beatles' songwriting, moving away from their typical love-themed ballads and delving into introspection and social commentary.
'Nowhere Man' is significant for being one of the earliest examples of this more mature lyrical content. It focuses on a solitary figure who is disconnected from the world around him and does not have a point of view, which was a stark departure from the band's earlier work.