I've always worn my wedding ring - well, the only time I couldn't wear it, was when it nearly slipped off my finger & had to have it made smaller.
However, when I was 'guinea pig' sitting for my neighbour, I noticed her wedding ring on the kitchen window sill. When they returned from holiday two weeks later, I mentioned this & she said "Oh, I only had a ring to exchange vows with, but hardly bother wearing it". They only got married two years ago & have two young boys.
I think it's up to the individual whether or not they wear a wedding ring, but it's something I'm used to now! My husband has always worn his too, although we bought it shortly after we got married! ;o}