Winston most enjoys talking to Syme about

Winston most enjoys talking to Syme about Newspeak because Newspeak is a language that is being developed and enforced by the Party in George Orwell's novel 1984. Syme is an enthusiastic supporter of Newspeak and actively contributes to its development. Winston finds their discussions about Newspeak intriguing because it represents the Party's attempt to control and manipulate language, limiting the ability to express independent thoughts and ideas. This topic also holds significance for Winston as he is secretly rebelling against the Party and values the freedom of expression that Newspeak seeks to suppress.