There can be many legitimate medical reasons that a person may have trouble expressing anger appropriately. Brain injury, fetal alcohol syndrome, mental illness like bipolar disorder, aubstance addiction, Tourette's syndrome, etc.

Approximately 1/3 of those who suffer from depression have difficulty expressing anger appropriately. But then, most all who suffer from depression have difficulty expressing most emotions appropriately while in the midst of a depressive episode.

so lox, if I am understanding you (and you keep insisting I am not, because you are pretty adamnant I am not getting what you are saying) you seem to be saying that some people just get off on being angry, and so get angry for kicks? For some power tripping purpose?

Sure, I can agree with that too. But I wouldn't call that behavior an addiction, because in my opinion, that is an incorrect usage of the word 'addiction'. I see addiction as being caused by ingestion of an addictive substance, not a compulsive behavior.

So perhaps we could either agree to disagree, or if we agree, agree to call the manifestation of angry behavior of which you speak a "compulsive behavior" rather than an "addiction". I can get on board with that.