Just as every coffee lover worth his terroir knows a morning brew tastes better when using beans freshly pulverised in a burr grinder, any spice lover worth his, well, salt should know that salt and pepper have a more robust flavour when the peppercorns or crystals have been freshly ground in a mill.
I usually peel everything with one of my ceramic or Adamantium knives, but I guess I could put my manliness aside and go for convenience and function with the Rotary Peeler.