I know several people that don't wear rings at all and some people that have traded their original bands in for something nicer.
DH lost his awhile back and we sold mine when times were really tough. I'm not very sentimental so it wasn't a big deal. We went through a really rough time in our marriage and plan to renew our vows at some point, and we will get new rings then. Until then, we're ringless and we're okay with that :)
So how about you? Original bands? No bands? Upgraded bands?