I have never worn any jewelry, my wedding ring included. Jewelry is just dangerous and uncomfortable. However, I decided to start wearing my wedding ring recently (since then I got my finger pinched between it and a door handle and got a blood blister). I was very surprised that just wearing my ring would help my students produce much more professional cast rings. This is how it helped.
Usually beginning students make huge, thick wax models. I have told students over and over again, year after year to thin out the bands, but they would not do it. This semester I would say the same thing then show them my wedding ring band as an example. Then they would go and do it. I am very pleased that so simple a thing could make such a difference.