Assumptions have always been my weakness. I make too many. I try to predict other peoples reactions or how a scenario might play out so I can prepare for whatever the next steps are ahead of time. When I am correct, I save time and effort, plus experience internal satisfaction, as we all do, that I got it right!  But for the times I am wrong, sometimes there is frustration or annoyance because my plans have fallen apart and I have to reorganize "the game plan". A simple example is planning how much food to make when company comes over. Too much or too little. Rarely my assumptions are correct.