Are you a hothead (someone who gets angry or agitated easily)?
http://dictionary.reference.com/browse/hothead
http://www.urbandictionary.com/define.php?term=hothead

From the song 'Angry Girl' by Syleena Johnson (feat. Tweet):

And if you find the love inside you,
You can have an open mind and
From your anger, you can be free!
Ohhhh if you listen you will find
What you’ve been missing all this time,
And in your heart you’ll discover your peace!

Angry girl, you know you’re breaking my heart
Because you’re making it so hard
For women like me to find Prince Charming!
I’m telling you angry girl,
You should learn how to smile sometimes
Before your happiness passes you by
And you never get to know what love truly means! 

http://www.youtube.com/watch?v=GTrCSrUIRzs

Sometimes getting a person angry is the only way to get them to release information....

Movie: A Few Good Men
https://youtu.be/9FnO3igOkOk

Slow to anger does not mean holding onto anger or holding in anger. Holding onto anger could cause an explosion.

"Beware of him that is slow to anger; for when it is long coming, it is the stronger when it comes, and the longer kept. Abused patience turns to fury."
- Francis Quarles

Do you want to be known as an angry person?

Song 'Angry Young Man' Billy Joel:

There's a place in the world for the angry young man
With his working class ties and his radical plans
He refuses to bend, he refuses to crawl,
He's always at home with his back to the wall.
And he's proud of his scars and the battles he's lost,
He struggles and bleeds as he hangs on the cross-
And he likes to be known as the angry young man.

Give a moment or two to the angry young man,
With his foot in his mouth and his heart in his hand.
He's been stabbed in the back, he's been misunderstood,
It's a comfort to know his intentions are good.
He sits in a room with a lock on the door,
With his maps and his medals laid out on the floor
And he likes to be known as the angry young man.

I believe I've passed the age of consciousness & righteous rage
I found that just surviving was a noble fight.
I once believed in causes too, I had my pointless point of view,
Life went on no matter who was wrong or right, ohhhhh

And there's always a place for the angry young man,
With his fist in the air and his head in the sand.
And he's never been able to learn from mistakes,
He can't understand why his heart always breaks.
His honor is pure and his courage as well,
He's fair and he's true and he's boring as hell!
And he'll go to the grave as an angry old man.

Whoa, and there's always a place for the angry young man
With his working class ties and his radical plans
He refuses to bend, he refuses to crawl,
He's always at home with his back to the wall.
And he's proud of his scars and the battles he's lost,
He struggles and bleeds ‘til he hangs on the cross
And he likes to be known as the angry young man.

http://www.youtube.com/watch?v=bpMv76SIUhg

"A hungry mob is a angry mob."
- From the song 'Them Belly Full (But We Hungry)' by Bob Marley
https://youtu.be/KIq7RvStNB0

It is normal to be angry once in a while.......

"Generally speaking, if a human being never shows anger, then I think something's wrong. He's not right in the brain."
- Dalai Lama

"I suppose there's an anger in all of us. Some hidden rage that you keep at bay."
- Dominic Cooper

Angry people seem to be more honest....

Twitter post:
Wikipedia ‏@itzwikipedia Apr 5
Anger triggers the region of the brain associated with honesty, that's when the truth comes out.