For me, Johns songs are what make the album compelling, mystical and magical. He was at his most creative in this period.
I absolutely love A Day In The Life (yes I Know Paul wrote the middle
hauntingly brilliant, those words are what made John a genius, same with Lucy, who else could write lyrics like that ? a song describing an LSD trip - a classic!
Mr Kite carries this on, a story about a strange circus with very strange characters, this song for me is like a painting, it triggers visions and feelings of another world of fantasy and imagination.
Good Morning is brilliant IMO, its one of the strangest pop songs you'll ever hear, strange time signatures, words about everyday life, why the animal noises at the end, LOL
As for Pauls I love Rita plus the brilliant title track and Ringo's, so he gets 3 hits for me, not too fussed on the others he wrote for the album, full marks to Paul though for the concept.