Be sure to put your render always in the focal, so in the middle or somewhere if you want to have the attention of the viewer on it, it will have a much greater effect. Remove the render which is set on soft light at the righter, it just does not fit. Work on your text, as mentioned above, work on the lighting and the depth and the flow as well, check out our tutorial section here, it is really great, it helped me the one or other time as well. ^.^ Anyway it is much better than the signature you have actually.