I didn't crush on Tom Hulce as a teenager, but rewatching the movie brought home to me how good he was. Because Abraham (deservedly) won the Oscar as Salieri, it can be overlooked, but this NT production really brings home how easy Mozart in Amadeus can become a one note caricature, and by contrast how Hulce made him into a human being. Even in the introduction scene, which is meant to shock both Salieri and the audience by showing Mozart giggling, groping and making scatological jokes, where you get the play's Mozart at his most lighthearted, the way he says (in reverse) "but I love you" to Constanze, is a sudden moment of utter sincerity amidst the teasing in the way Hulce plays it. Gillen? Just shouts. And I already mentioned the glaring contrast in the scene where Mozart pitches Figaro. People just tend to remember the giggle, and that's unfair to what Hulce actually does with the part.