I think understanding personality types is pretty useful, actually. The trouble arises when people don't acknowledge the traits are on a continuum and could ch

I think understanding personality types is pretty useful, actually. The trouble arises when people don't acknowledge the traits are on a continuum and could change over time. So the letter classification can be misleading. For these to be predictive, I thing they are useful but must be joined with other variables. Air temperature is not meaningless when predicting the weather, but it is not sufficient either.