Apart from his work in architecture, Tssui has pursued assorted other areas of interest. His efforts in design extend out to clothing and furniture, and often reflect similar concerns about movement, weight, and sustainability as appear in his architectural designs. He also pursued a number of athletic endeavors. The most notable titles to his name include the super middleweight boxing title in the 2005 Ringside World Championships, the world's largest amateur boxing tournament, and the Presidential Sports Award, both of which he won eight times. He is also a four-time Senior Olympics Gymnastics All-Around Champion.