Graysmark was a consummate professional, sought-after by many first-rate directors. According to Clint Eastwood: "When I work with someone and I like the work they do, I'll continue to work with them. And John delivers. Not only is he the premiere production designer out of England, but he's not a prima donna. He's a straight-shooter who takes initiative, has experience, and is easy to talk to." (American Film, June 1990).