Product Pictures?

[lsg]

I think the white background gets my attention the most.

 

[silverspringsoapmaker]

White background for sure. It'll blend better into any website you use to sell them.

 

[Seawolfe]

If you know the website you will be using, and if you are "green screening" the background, or even using white, you can color match the websites background in Gimp or Photoshop - that always looks pretty smooth.

 

[CraftyRedhead]

I really like the wood. I see everyone on etsy using flat white backgrounds, I think the wood is a nice change. To me the second one is so white it's sterile, not super inviting. But clean, if that's what you're going for!
For underneath, if you do choose wood behind, maybe you could do a bit of fabric - even split the difference and do a nice white soft fabric (like a fabric napkin). Then you have the white that some like, and a bit of nature in the background?

 

[Sprag]

I like the wood background

 

[Lindy]

White background

 

[elmtree]

I'm torn. I think the 2nd 3rd and fourth are all really pretty and well done. I'm struggling with this myself!