Here are a couple good examples from the Teaware of the day thread, with apologies to Muadeeb and Bob_Mcbob. I will use these to illustrate some points I made above. There are better examples out there on these forums, but I just chose a couple from a recent thread and avoided digging through old ones.
Although the sunlight in this picture is kind of harsh (as evidenced by the solid, hard edges of the shadows and bright hotspots on the body of the pot), Muadeeb did a good job compensating by keeping the sun behind him to keep the pot well-lit, contrast down, and distracting shadows at a minimum. The angle he choose is good - by shooting on a level plane with the teapot, the shape of the teapot is easy to see. Also, I like pictures of Chinese teapots taken straight-on at the side, as this makes it easy to appreciate the shape and proportions of the handle and spout. The background is also mostly free from distractions (it helps that it is out-of-focus too).
This picture is indeed very good in my opinion. It is well-executed and easy on the eyes. The light-colored teaware is very easy to see against the solid, dark background. Although the light is obviously coming from the left-hand side of the picture, which leads to a few unnecessary shadows in the picture, the quality of the light is very good, which minimizes any detrimental effects of the side-lighting. The teaware is in focus and very easy to look at and appreciate.
Although it's not necessarily obvious from the pictures above, they both appear to have been taken with a relatively long lens/zoom length, which ensures that the proportions of the objects in the pictures are representative of the object in real life.