Percentiles.

It would be nice to now what scores makes the cut in a given category. For example, put somewhere on the category page a score (say, 612) that tells us what score make the 20% cut, so we know without scrolling down if an image is in the top 20%. This information would also be relevant since it will tell us which categories are most competitive. I like challenges and information.

I know it will be the most used number on pixoto!