i usually lok at the images that seem to have the most work put into them and the most realistic detail. By now everyone has seen or done the naked vicky with the default or store bought textures, everyone has done the zygote dragon with no morphs and the same textures. there are things that have the same models and the same scenes as every other picture, i dont usually look at those. Thumbnails that dont show the entire picture but make the viewer WANT to know what is going on is a good way to grab viewers. You could just stick a nude photo in there and get a ton of hits, but that wouldnt automatically make it a great piece of art, though i do believe the female body is a very beautiful thing, im looking for quality work, not cheap thrills. The title is another important part. If it doesnt sound interesting, it probably wont be looked at. I think the best thing is not having everyone look at it, but having a very good and well respected artist look at - and then compliment you on it. Find an artist who's work you admire, and ask them to look at it - if your work gives a good impression, word will get around.