Like the overall idea of the signature but I think it could use a bit of a revamp. The super bright white effects on the right and the white border at the bottom draw your eye away from the render focal point (which isn't blended very well. Talking about the blue effects over her face). The text is meh, not a fan of big italics, and the whole signature is generally oversharp. The flow and composition are nicely done, but all those things retract from it, so as I said in the beginning, a revamp could be very beneficial. Love your Brad Pitt signature by the way.
