Hi there. These are very nicely done. They (personally speaking) do not look “photo realistic” per say… but in a way they look even better. I like them very much.
With that said, I think you have a few problems. First is a scaling issue. In the ones where they are with a chain, either the rings are about three inches across or the chain is thin as a hair (I have never seen a chain that small). Just scaling up the chain would probable fix that.
In the one were they are casting the heart shadows (which is really nice) it is really unclear what they are sitting on. My suggestion is to make what they are sitting on the crease of some sort of book.
Last is the one were they are on the turntable. Again a scaling problem. It looks to me that the rings are about… oh… a foot in diameter (of course, if they are solid gold I would still want them :)). The wood, from what I can see, looks pretty good. The cloth though, could use some work. It looks like a procedural texture influencing the bump way to much. It might be a bit shiny also. My suggestion is to get a good cloth texture to use.
Well, those are my thoughts. Really like the overall feel and look of the pictures. They are coming along.