I have always loved the idea of the signet ring. If your to ever get a ring, that happens to be something other than a wedding band, let it be a signet ring. It not only screams authority and power, but it lets everyone around you know that you probably went to an ivy league school and serves as the chair of some not for profit organization. I was just kidding about the last part. But it is truly a classic ring that every true gentleman should have.
"used to attest the authority of its bearer, the ring has also been seen as a symbol of his power, which is one explanation for its inclusion in the regalia of certain monarchies. After the death of a Pope, the destruction of his signet ring is a prescribed act clearing the way for the sedevacancy and subsequent election of a new Pope." ~wiki