We used to have some really great discussions around here with a poster named Coach, and some others, about "reactivity." Learning NOT to lead with your emotions, and NOT to be reactive.
I've always said that DBing isn't complicated, but it's also not EASY. It does require a great deal of self-discipline, I think. Those that have trouble with self-discipline, and with being too emotionally reactive, seem to struggle with DBing the most.
But the good news is that you can LEARN those things!!!