Like most Forums members over a certain age, I started with Vulcanite as the primo and best stem material. Everything else was stop-gap. Over the years, I have come to accept the good grade Lucite and Acrylic stems (is there a difference in those plastics?). They don't trouble my teeth in medium sized pipes, and they seem to wear better with fewer tooth marks and easier cleaning, and no staining. I still enjoy buying Vulcanite stems, considering them a sort of old time luxury, but I don't disdain Lucite at all, and see it is now used by even the high end artisans. Do you hold out for Vulcanite, or prefer Lucite, or split the difference?