What are you trying to do, get the Poser forum shut down? But seriously, it's a great question, one that we can only ultimately answer for ourselves. I think context matters, and concept (are you just arranging things so they look nice, or is there some interesting, ulterior motive behind it all?), and originality--making the image not about the props and textures and lighting, avoiding content that's easy or sentimental or cliched. But that's just my .02-worth.