This is just a random idea I thought of the other day. I think it would be cool to display the top liked posts of the past day/week/month/whatever somewhere within XenForo (maybe the sidebar... maybe as a tab.) It would give users incentive to post meaningful content in order to get people to Like it, and it would also give people a quick reference of good content to check out. Win-win all around. Anyway, just wanted to throw the idea out there!