What is one thing I could have done differently but chose not to?

...hmm,I had to think deeply but yah, I don't need to think far.
One thing I could have done differently but chose not to is over reacting in anger when I felt disappointed by people I had expectations on. Yea, recently, people kept testing my patience through their actions. My old me could have raised my voice and speak harshly out of frustration but I choose to be calm regardless. I think I am growing better , I hv come to realize that everyone can't meet up with my expectations and it's fine. Life is a gradual process..