@Madmungo I do like the image but, if you will allow me, I'd like to point out a few things that can be improved upon:
1) The soles of the feet seem a bit bland. There are quite a few products that you can find here to specifically improve the realism of those.
2) The eyes seems to look into a non significant direction. Try having those meet the eye of the viewer, you will find the image to become more impactful.
3) The arm in the front of the image seems to be intersecting rather than colliding with the sofa. DAZ can handle those collisions (one collision; for multiple collisions thing would become a lot more time consuming to achieve).
4) I think this image could use some FoV Depth of Field.
Hope these tips help, and keep on improving!