What Stats fields do you use, really? (and what do you wish we had?)

We're interested in knowing what stats fields you *really* use, and what stats you wish we had. Let us know - this information will be extremely valuable to us as we try to figure out how to improve the Stats system (both in scalability in the future by removing unwanted/unused stats, and in usefulness by knowing better which stats would be valuable that we don't yet expose)