I guess we all need some help in dealing with our emotions. I don't like people who become aggressive when angry and hurt themselves or others. But it's also not good for someone to keep their emotions inside and make themselves ill because they are unable to express it. We all need a healthy way to release anger and we need to be able to control it.
I'm good at controlling my anger. I definitely look angry, one can tell from my body language and sharp looks. But I don't lash out at others, yell at or abuse them. I usually say what I have to say calmly and then vent my anger by exercising or confiding in a friend.