I used to avoid anger until I discovered that feeling angry about something is an invitation to get to know myself better, get to know what I truly care about. We might think we know ourselves, but maybe there's a deeper, caring side to ourselves that anger can help us explore.
I feel angry when somebody disturbs my work flow with what seems to me an unnecessary question or irrelevant remark. Why? It feels like the person is questioning what I do or who I am. But the real question is whether I believe in what I do and in who I am? Because if I do, would it matter so much if another person doesn't?
I think when we examine ourselves, mostly our anger is really with ourselves. We don't love ourselves enough. We don't take time out to discover and enjoy that loving goodness which abides deep within us. The goodness who says 'oh hi, how are you?' and takes an interest in another rather than expecting the other person to understand.
When we truly understand the beauty of our own being we'll automatically appreciate the beauty of that other human being also.