On the old CIT website they had a feature called "low hanging fruit" that compared your personal badges to everyone else's and would provide a list of around 20 or so that was the most collected by everyone else that you still did not have. I was wondering if you were going to implement something similar on your website.
In the old City of Heroes that was how i collected all my badges so i didn't get bored just doing the same type of task over and over again, i would look at my low hanging fruit and pick one to work on and then go and check the "fruit" again after i finished it for something different. I know it may not have been very efficient that way, but i enjoyed it lol.