I was considering switching from the blue backdrop I've been using for over a year to white because it's often recommended to use a neutral color for the background of product photos, either white, black, or gray. Now I don't have a gray backdrop and I make some jewelry which is black so that wouldn't have enough contrast for those items so I tried white. I originally chose blue because I make sea creatures so the blue invokes water and the sea.
So I put the 4 images above in a survey and asked people in my network to take it and rate each photo on a scale of 1 to 5 (1 being strongly dislike and 5 being strongly like). The results surprised me. I personally like the blue better and was hoping it would come out on top but I was surprised by how much more other people preferred it. When the two blue photos were averaged together they had a score of 4.17 while the white photos got a score of 3.87. Even more telling was that the necklace with the coral prop on blue scored 4.22 and on the display bust it only scored 4.11. Even for the white background the coral prop scored 4.0 over 3.74 for the display bust.
I'm going into detail on my results here for a reason, even though I created the survey to tell me which background color people liked best it also told me that I should be using the photos with the coral prop for my main image and not the display bust which I had been using. Sometimes you get results that tell you more than you had expected and that is the value of using these sorts of surveys. So give it a shot. Do you have 3 different banners for your shop and don't know which to use? Do you want to know if people are more interested in t-shirts for toddlers with kittens or puppies on them? If you want to entice more people to take your survey offer a coupon code for those who complete it (simply add a last page to the survey with no questions and just text that includes the coupon and a link to your shop).