John Lennon always complained that Paul MacCartney wrote a lot of schlock, but Lennon seems to have written rather a lot of "achlock" himself of which Imagine may be the best or worst example, depending on your point of view. However, like MacCartney, he has also wriiten some wonderful songs. Among my favourites are Working Class Hero, Instant Karma (We All Shine On), Julia, Hide Your Love Away, Mother, Across The Universe and Come Together.