George's last years were marked by increasing physical and mental decay and withdrawal from public affairs. Privately a senior aide to the King confided to his diary: "A more contemptible, cowardly, selfish, unfeeling dog does not exist ... There have been good and wise kings but not many of them ... and this I believe to be one of the worst."
The Regency period saw a shift in fashion that was largely determined by George. After political opponents put a tax on wig powder, he abandoned wearing a powdered wig in favour of natural hair.[72] He wore darker colours than had been previously fashionable as they helped to disguise his size, favoured pantaloons and trousers over knee breeches because they were looser, and popularised a high collar with neck cloth because it hid his double chin.
During the political crisis caused by Catholic emancipation, the Duke of Wellington said that George was "the worst man he ever fell in with his whole life, the most selfish, the most false, the most ill-natured, the most entirely without one redeeming quality"