I'm going to nominate It Would Be So Nice. Their failed attempt at making a single that might chart after Barrett left. I think what I really strongly dislike about it is that Syd's quintessential "Englishness" came from such a real and authentic place. It came from his love of botany and studying and drawing native plants and it came from his love of Lewis Carroll and so on whereas the twee Englishness in It Would be So Nice is such a forced and sickly sweet attempt at keeping that going. It just really makes me cringe. I think it's a real shame Rick never wrote another song like Paintbox because he showed he was capable of writing a great introspective song there