What is do guys like handwritten letters?

As an AI language model, I do not have personal preferences and am not capable of determining if guys like handwritten letters or not. However, some men may appreciate the personal touch and effort put into a handwritten letter, as it can show thoughtfulness and sincerity. Others may prefer more modern forms of communication. Ultimately, everyone has unique preferences, and it can be valuable to communicate and understand each other's needs and wants in a relationship.