Critique:
This looks loveley! The pictures chosen fit the mood and the lighting helps to achieve that as well.
I like that the photos are varying in size so they add more interest compositionally to the signature.
The use of two fonts makes the piece look more interesting, and I liked how you put his last name behind the main model.
I like that you thought about which component goes in front of which, it adds depth to the work<3
The texture use is good and the minimal stocks add a nice touch to the signature.
I like that you thought about the shapes in the signature like the curve of the texture framing the larger model,
and the curve of the texture on top of him.  I can only think of one minor suggestion to help you out.
Remember to vary your horizontal and vertical model placements, it allows for more (eye) movement.
Currently in this signature, both images have the same eye level, try playing with this and see how it goe