Dick Button taught us what made a good spin, a good landing position out of a jump, the importance of flow across the ice.
And he wasn't afraid to point out counterexamples.
And while he highlighted American skaters for his audience, he wasn't nationalistic. He loved the Protopopovs, Rodnina and Zaitsev, Torville and Dean, Kurt Browning, John Curry and Toller Cranston, Oksana Baiul, Midori Ito... and many other non-Americans too numerous to list. He set a good example.
Having grown up with his commentary, I knew he'd seen a lot of great champions, and it took a lot to impress him. A skater couldn't deliver a mediocre performance and expect raves. He often highlighted very good elements from skaters who were not at the top of the heap competitively, and it helped me learn to pinpoint skaters who had quality and might rise.