I just imagine, if everyone provides a data description list of all shared PRIR, eg, which one is more suitable, which one is less, which one has bad tone, and which one has less front image or totally werid, then I think we can have a entire portfolio that may reflects whose ear is similar to whose, whose ear is far from the everage, I think data from any where in the world obey the rule of normal distribtional curve, if two person's ear in the same tail of the curve, they may have similar experience, if the two in the opposite tail of the curve, they may have totally different experience, I have tried around 20 person's PRIR in MSM studio, I found that 7-10 people's PRIR are quite similar, the tones are similar, 2-3 person's tone are more dark, and 2-3 are more bright, 2-3 PRIR are very good to me, 7-10 are in everage and 2-3 are totally unusable.
I guess my ear may just in the middle in the normal distributional curve, and the PRIR of MSM provided are almost in the middle in the distributional curve, Captain Funk's ear may far from the everage ( that's what I guess:-0 ) so he felt that most of PRIRs are not usable,
Therefore I guess if everyone knows what distributional curve position of his ear in, for example if he knows his ear is in the middle of the curve, he may happy to gather different PRIR because he will find more PRIR suitable for him, if he knows his ear is far from the middle, maybe it is a bad luck, he should do more personalised PRIR because he will find few non-personal PRIR suitable for him :)