Galaxy Zoo should be your model for tagging - just like what was done in the old-VW. Plenty of users love to tag images. No sense in having contributors make the tags when thousands of others will do so. No idea what the tags should be when the dictionary is full or descriptive words for the variety of images submitted here. The new-VW seems less and less wanting a connection between contributor and viewer. Ask us to feed you a short list of words is not interaction with the contributors.
Voyeurweb is a free photo sharing website with a focus on nudity and some softcore amateur pornography. Started in August 1997, it has since become a very popular amateur online community.