There are a suprising number of ubertights w/ PFR %'s of 3-4. If I have at least 200 hands of history on someone and their PFR % is around 3, then I am laying down KK to a reraise unless I have implied odds for set hunting. If they are only raising w/ AA, KK, QQ, and AK, then they are probably only reraising w/ AA and KK, and since I've got KK ...