Author, sorry I am only getting around to all of these entries now, but here are a few tips for the future:
1. As the shape of the bowls are rounded, so the yellow stripe should bend. Try a radial gradient instead of a linear gradient.
2. With the light from above, the bowls would appear darker color at the bottom near the table. That's because the top half of the bowl (to its widest part) will block the light and cast some shadow on the bottom half.
3. You created a very nice illusion of depth with the edges of the table and the pots - wider / larger close to the viewer (bottom) and narrower / smaller farther away (toward center). To complete the illusion, the plaid pattern should also appear smaller and narrower at the end of the table farthest away. You can accomplish this by applying the pattern to a rectangle first, flatten, then apply Perspective - it will change both the shape and the pattern.

Hope this helps!