"For memories of all specific emotions, intensity accounted for significantly more variance in autobiographical memory characteristics than did valence or age of the memory.
In two additional experiments, we examined multiple memories of emotions of high intensity and positive or negative valence and of positive valence and high or low intensity. Intensity was a more consistent predictor of autobiographical memory properties than was valence or the age of the memory in these experiments as well. The general effects of emotion on autobiographical memory properties are due primarily to intensity differences in emotional experience, not to benefits or detriments associated with a specific valence."
"Emotional intensity reduces perceived psychological distance.
(...) What makes things seem of greater or less psychological distance?
We hypothesize that emotional intensity influences time perspective, reducing perceived psychological distance. That is, people perceive events of equal objective distance as less psychologically distant when people feel more rather than less intense emotions about those events."