It's rare to find a consistently creative or insightful person who is also an angry person. They can't occupy the same space, and if your anger moves in, generosity and creativity often move out. It's difficult to use revenge or animus to fuel great work.
An Eskimo custom offers an angry person release by walking the emotion out of his or her system in a straight line across the landscape; the point at which the anger is conquered is marked with a stick, bearing witness to the strength or length of the rage.
I'm not an angry person, just very disappointed and contemptuous of my fellow humans' choices - and on stage those feelings sometimes are exaggerated for a theatric stage - you're on a stage you have an audience of 2500 or 3000 people: you need to project the feelings, the emotions it's heightened, and people mistake it for a personal anger but it's more dissatisfaction, disappointment and contempt for these things we've settled for.
The frequency of anger attracts the frequency of anger, the frequency of greed attracts the frequency of greed, and so on. This is the law of attraction. Negativity attracts negativity, just as love attracts love. Therefore, the world of an angry person is filled with angry people, the world of a greedy person is filled with greedy people, and a loving person lives in a world of loving people.
Anybody can become angry - that is easy, but to be angry with the right person and to the right degree and at the right time and for the right purpose, and in the right way - that is not within everybody's power and is not easy.