For whatever reason, I haven’t had to deal with many angry people in my life, and I’m not much inclined toward anger myself. As everyone else has commented, it can be a terribly destructive force; but I wanted to mention that there are ways it can be put to positive use.
My religious tradition uses the term “angry determination” to describe a mindset that can be useful when one has to find an extra measure of psychic energy to accomplish a very difficult task. It involves focusing all the attention on the task, and then guarding that focus angrily from self-imposed impediments. In other words, whatever internal resistance or distractions arise that would act as obstacles to the work are angrily batted away. This can lead to an extremely potent state of focus.
Iconographically, this angry determination is represented as Fudo, a ferocious figure holding a sword and surrounded by flames. What makes this anger productive rather than destructive is that isn’t directed at anyone, not even oneself, but at one’s self-imposed barriers to progress.
Angry determination has given me many a useful boost when I’ve seen my habitual indolence start to drag me down.