According to Yeh Kuo-liang, dean of the College of Liberal Arts at NTU, Kung loves telling jokes, whether teaching, eating or drinking. His relationship with students is relaxed and cheerful, especially when he's in a drinking mood--and he is reputed to be able to drink many a younger man under the table.
台大文學院長葉國良表示，孔老師不論上課、吃飯、喝酒時都愛講笑話，師生相處輕鬆愉快，尤其酒興一來，「我們年輕人都喝不過他！」有一次潘美月和臺靜農教授「設計」孔老飯後到他家小聚，以便要到老師的書法真跡。