I can't stay angry; I have multi-sensory aphantaisa, this comes with not being able to re-experience emotions.
I remember that something made me angry, but I can't relive the emotion. It lets me dispassionately examine the past to see what made me angry and thus work through the trigger and try to reduce it in the future.
There is the downside to this, it is on all emotion, so I also can't re-experience happy emotions either.
If I'm understanding umit correctly, it's more like they only experience the emotions of a situation in that situation and memories lack that cognitive association with those emotions.
e.g. So a situation I get angry / sad about happens. Unless it keeps up the feelings wane over the next few minutes, thinking about the triggering events does not bring back the emotions.....if I want to stay angry, I have to really work at it too keep the emotion going, it is never "worth" the effort.
If one thing makes me angry, and I haven't had a few minutes to let the emotion fade, and something else tips me off then the anger builds at the new thing and fades for the old thing; it just happens faster.
In saying that, I really don't get angry all that often; as I have worked through most of the things that set me off. Except bullying, that still fucks me off to no end.
Okay! I'll maintain the unflappable facade until you become... less flapped.
That sentence really got away from me. The point is I mean well and I get at least some of what you're talking about. And! I can ask you to come be angry for me when I'm unable to flap! A perfect system!