Hello Auxiliary

I've read into defense mechanisms before, but I didn't get what isolation of affect was about until I read your example for it, and now I have to say I really do use this all the time.
I'm trying to avoid "putting the pieces together" in my head so as to avoid forming a whole picture of what is going on, and in turn avoiding damage to my self-concept and worth, and so on. IOA may also explain why despite remembering what happened, I don't always feel hurt by it anymore.
With painful memories, my mind usually goes amazingly blank when it comes to percieving emotions. The same is if something bad is happening to me interpersonally in that very moment, I won't show or feel any emotions like being hurt, humiliated and such untill I come home and totally crush down.
Sometimes, I think, I use this defense mechanism intentionally, like I already percieve the gap between experience and (lack of) emotion, and targetedly split the two even more because I don't want to feel anything. At other times, this inability to feel emotion gets really annoying. This is when I feel numb and estranged from myself, and try to figure out how to emotionally evaluate a certain thing, but just can't. It makes me really frustrated with myself.
I don't think this is the same as objective reflected evaluation of an event though, when you are aware of your feelings and able to percieve them and at the same time view them from an outside perspective as well. That would rather be the constructive, healthy variant of what IOA is trying (and failing) to do I think.
To somehow knit this thread along, other defense mechanisms I use a lot: intellectualization, identification with the aggressor, hardening, daydreaming/mind wandering/searching for distractions (kind of a cognitive form of avoidance).