As always, the design looks terrific.
One issue, and that is the text. It is difficult to read on sight, and requires the viewer to squint. To fix this, stroke the text with 2 or 1 pixel black. Alternatively, make the text a darker yellow (...Though that could ruin the design's flow).
Don't get me wrong, the yellow looks outstanding and catches one's eye. When you consider your signature to be finished, look at it and think to yourself; Is there anything else I can edit to make it look better? How can I make it more visually impacting? -- those two are questions I think about for the after effects and adjustments of anything artsy I do.
Other than that, it does look eye-catching.
