My anger issues are related to my meltdowns.
They happened quite a bit when I was young, and don't happen much now, but they still happen.
I get frustrated easily and expect things to come easily to me. Small things annoy me quite a bit, and I don't like dealing with people at work.
I am pretty careful not to get angry with my wife, or yell at her, but I have certainly yelled at strangers, and even co-workers.
Afterwards, I am always embarrassed and feel terrible, but it is difficult to manage this stuff.