[ponderingHplus]

Thanks for the detailed response! I think you and others on here are right, there's a better way to do the ranking so the results closer represent what we're looking for. I think I need to better define what question we actually want to answer with this data and then establish the metric that best measures that, and your ideas definitely give some hints for some directions that measurement can go. I especially like the idea of "boosting" cities that have a rare topic the user is interested in. Thanks again for the interest!

-pH+