Well, yesterday I played a very similar hand against a huge fish, except that I actually did have the full house, and he folded the river which I never thought he would do. So maybe you're right. I probably don't bluff often enough in really big pots (I hardly ever do it).
I never said the play was terrible, I just don't think "OMG how could this fish call me!!!!" is a very productive way to analyze a hand that you played.