Work on lighting, adding more depth to the background, coloring, and text especially. Those are things that most people who are new to PS have trouble with. You need to experiment with gradients in your work to add more depth to the overall outlook of the sig. Shapes, pen tool etc are also good for adding depth. Text can't be slapped on there and put on soft light. add some effects, dup. the layers and set them to soft light with blurs,sharpens, etc. It helps a ton.Keep workin on this and it could be nice.