Would be awesome and really helpful to be able to sort a large list by some popularity measures that could be pulled in. Almost all of my bookmarks have some kind of popularity metric associated:

Product Hunt Upvotes

Github Stars

Google Reviews

Info From Structured Data

Yelp/Foursquare Reviews

Popularity based on number of bookmarks

Facebook Likes

Twitter Mentions

Aggregating all of that and keeping it simple in the interface would be quite a task. Even just product hunt votes would be great. :)