no i always under hydrate i prefer al dente
Under-Hydrate may cause un-even texture --Within-- the strand of noodle..
It's a preference, not better or worse.
However, if we think about how a noodle is cooked, from the outside in..
Assuming that an IDEAL cooked point exists, then by the time the theoretical center of the noodle converges upon it, ALL of the noodle surrounding that axis has gone OVER.
My method to counter this phenomenon, is to cook the noodle thoroughly (5-7 minutes), but, Then Rinse the completed noodle in Ice-water to reduce the noodle's gelatinous entropy. This also requires using osmotic pressure to increase concentration of flavoring inside the noodles, due to the rinsing, which removes the external coating of soup syrup.
There can be no perfection, but I believe my method to be optimal in preserving the concentration of flavor AND bounce-texture..
Under-hydration would not work with my optimization, because if the noodle center has not crossed the fully cooked point, then we simply can not alter the center in any way, as there is no access to it, if the assumption is that it would stay- under-hydrated.