If you retake your photos, try to keep a coherent background going. Try and make sure every product is photographed in the same place. I like white backgrounds - they remove all distractions from the product, and are also more likely to make it to the front page - that's not something EVERYONE cares about, but I do.
One thing I will state though is that in some countries it's against the law to sell pierced goods that have already been worn for hygiene reasons. I don't believe Etsy's T&C have anything around that, but international customers might be wary. In this case, I'd have only one pair of earrings that are the same size and shape as all your others and have them modeled, but use it as a secondary picture rather than the first, so that people can see the size and shape when worn. Alternatively, you could use the same earrings but change the backs after they've been worn, or make a second, identical pair to be photographed.
It might seem like a lot of trouble, but pre-worn earrings and other pierced goods can be very off-putting to some people, especially those with sensitive ears.
