I wear Maca's ring (my wedding band) on my left hand.
I wear GG's ring on my right.
I like this trivia (you can find it on wikipedia)
The finger is always the ring finger, but there are cultural differences whether the wedding ring is worn on the left hand or the right hand....
The right hand is the traditional hand for vows or oaths. It is raised when such an oath is given, so the wedding ring would here show the sincerety of the oath....
In Western cultures a wedding ring is traditionally worn on the ring finger. This developed from the Roman "annulus pronubis" when the man gave a ring to the woman at the betrothal ceremony. According to tradition in some countries (derived from Roman belief), the wedding ring is worn on the left ring finger because the vein in the left ring finger, referred to as the vena amoris was believed to be directly connected to the heart, a symbol of love. Blessing the wedding ring and putting it on the bride's finger dates from the 11th century. In medieval Europe, the Christian wedding ceremony placed the ring in sequence on the index, middle, and ring fingers of the left hand, representing the trinity; God the Father, God the Son, and God the Holy Spirit respectively. The ring was then left on the ring finger. In a few European countries, the ring is worn on the left hand prior to marriage, then transferred to the right during the ceremony. For example, a Greek Orthodox bride wears the ring on the left hand prior to the ceremony, then moves it to the right hand after the wedding. In England, the 1549 Prayer Book declared "the ring shall be placed on the left hand". By the 17th and 18th centuries the ring could be found on any finger after the ceremony - even on the thumb.
In Norway, Russia, Ukraine, Bulgaria, Poland, Austria, Germany, Denmark, Latvia, some countries of former Yugoslavia and in Spain (except in the former Crown of Aragon (Principality of Catalonia, Kingdom of Valencia, Kingdom of Majorca and Kingdom of Aragon) the wedding ring is worn on the ring finger of the right hand. In the Netherlands, Protestants traditionally wear their engagement ring on the ring finger of the left hand, and their wedding ring on the ring finger of the right hand (a practice which is also widespread in Germany), whereas Roman Catholics do the opposite. In the Dutch-speaking part of Belgium, the wedding ring on the ring finger of the left hand is traditional among Roman Catholics living in the provinces of West Flanders and East Flanders and in part of Limburg, but not elsewhere.....
In the United States, United Kingdom, Ireland, Canada, Australia, and many other countries, an engagement ring is worn on the fourth finger of the left hand. The tradition of wearing a ring for engagement originated from the Egyptians, who believed the circle was a bond between the two people who were to be married, but was initially first practiced on the fourth finger/ring finger by the Romans, who believed this finger to be the beginning of the vena amoris ("vein of love"), the vein that leads to the heart. The custom in Continental Europe and other countries is to wear it on the right hand; one historical exception arose in monarchical regimes, in which a nobleman entering into morganatic marriage (marriage between a high noble and a lesser noble or a non-noble) would present his left hand to receive the ring (hence the alternative term "left-handed marriage" [Ger. Ehe zur linken Hand)....
Christians, or traditionalists wear the ring on their left hand, while Orthodox Christians and Jews traditionally wear it on their right hand....
The left hand is also used for cultures that believe in the vena amoris or "vein of love" that is believed to be found in the left ring finger.....