I don't know how common this is, but it's something I've noticed in bits and pieces over the years and it became glaring obvious to me this past week. I can get extremely frustrated with someone, but it seems like after I sleep at night all that emotion disappears. I'm able to remember the situation and the fact that I was definitely angry, and I still want to be angry about it, but for some reason I can't call up the emotion again. It's as if I have emotional short-term memory loss. Does this make sense to anyone else?