Currently, we have access to the token/image galleries and associated searches, and the ability to star images we want to show up next time. What about a search option that let us search everybody's starred searches first, tagging the stars on the backend with whatever search phrase we used? This way with each successive search for 'goblin' we can, as a community, weed out the images that pop up first. It lets us sort by an image's popularity in the database, and keep a search for 'kittens' from bringing up a vast assortment of firearms first.
Perhaps differentiate it by adding a checkbox above the search area labeled "Search Community Choice items?"