I think calling a minraise with TPGK everytime is a big leak, well, it is a big leak. One of the more important reads you can have on a player is what a minraise or minbet means. Depending on their stats you can usually get a general feel for what it means, but putting a third bet in and seeing how they react gives you very valuable information. As a standard play though, if you are minraised on the turn or river and you only have one pair, you should fold.