I don't think experienced shavers necessarily opt for mild razor/sharp blade option, it's a good option for shavers at all levels because it reinforces the idea of beard reduction rather than elimination.
Who know's what your beard and technique are like, that's why it is always suggested you initially stick with one razor and work through a blade sample pack, not to improve the performance of a razor but just to find what suits you best. At the moment you like the Personna, you might find that a Super Thin, Derby, Bleue, Crystal, Iridium or Feather perform even better for you.