I was watching a repeat on the Beeb of Michael Portillo in Hong Kong (as with me, a 2019 visit) earlier this evening and he filmed with a chap making hand-made noodles in his flat - he said good noodles should "dance in your mouth"...maybe, along with "al dente", that may be applied to spaghetti as well..?! I did try such noodles near where I stayed in the Wan Chai area of Hong Kong and they were good.