Steve, it's already been done. B&K's 1974 study showed that,
in general, listeners preferred a measured response, at the listening seat, as follows:
Some emphasis in the bass region, then gentle rolloff consistent with a flat response adjusted for room gain at the listening position. Harman's recent studies show that listeners preferred the top curve shown on slide 24 here:
https://docs.google.com/fileview?id...mUtNDEyNC00ZDcyLWEzZTAtMGJiODQ1ZTUxMGQ4&hl=en, which is a more consistent rolloff from bottom to top, again consistent with room gain at the listening position.
Having said this, these are not predictive of any individual preference i.e. what you or I prefer may not be the general preference (though I believe Marty has measured and found your system to be consitent with the B&K curve).