I think a valuable metric would be to display how many views a post has had, this could be displayed on the summary near the comments and could serve as an indication for people looking through post as to the quality of the content i.e high views but low votes would suggest sub par quality and vice versa.
This would also be useful to content creators to see how many people have actually viewed their post and use that number with the amount of vote received to determine the posts impact on the community.
Thoughts?