Anger makes my blood sugar go up, which rewquires more insulin. Insulin is vvery expensive and wasting it on emotions seems counter productive to me. So, I avoid getting angry; instead I get crafty in my plans for revenge.

Any person certainly needs to know what makes them angry. Otherwise, the person is open to manipulation. I learned that painfully from my first wife. She knew what my hot buttons were and how to push them -- and did it daily. Also in any conflict situation, if you can make the other person angry, you can lead them into behavior which can be used against them.

The things that make me angry at the onset still make me just as angry if I'm reminded of them later. My goal is to find more productive things to occupy my mind, instead, so that the angry thoughts get shoved to the back burner.

I get angry less and less but seems I get sadder as well.

Sometimes, anger can be used as a force multiplier. So, I'd say that working up a real good anger, at the appropriate time, is ok.

I think anger can be a fantastic motivator.
I don't look at anger as a negative, at all.
It's like the whole thing about "forgiveness". What a load of crap.
I don't need to "forgive" anyone. I'm either going to get over whatever
it is, or I won't. Forgiveness is just some feel-good bullshit made up by
religion.

It's all in your perspective. Mine is way different from what "conventional wisdom" may dictate.
I also have no use for conventional wisdom.
I can think for myself.

I don't associate with people that irritate or anger me. It makes life alot more pleasant.