I'm not sure if other INFjs (or ENFps) relate to this: I tend to look back at the past and wish that I had done something different about particular situations, and perhaps things could have been better for me now. I think it has got to do with and imagining possibilites that might happened. I tend to judge myself based on my past experiences rather than what I am achieving now or can do in future to make up for the loss I had. To me, if my past wasn't perfect (in my own eyes), I don't feel that I have lived a life full of purpose. I can't help feeling that I have failed to live up to my own expectatons and nothing I do subsequently will make up for it. I will feel this way whenever I'm alone, or interacting with an EXTj 'cos their dynamic and interesting personality and achievement in life always make me feel very small.