Well, you may think you didn't choose your responses, it is the doing of your personality, but in fact, you have chosen to respond this way because you allow your personality to take control. If we can train elephants to do tricks, we cannot train our own behaviors? Your daily training (or not training) has developed a habit.
Eventually, we are called to be Christ-like and not phlegmatic, sanguine, melancholic, or domineering. Therefore, I think that it is an excuse to say that the reason we make mistakes because we are created in a certain way. Your explanation (excuse) is for others to empathize with you and give you time to change, but it is not a good enough reason for you to accept that you will always respond this way (the phleg, sang, mel or domi way).
You can continue to tell yourself the lie that you are created as such and therefore you cannot help it when you response in a certain way & people just have to accept you the way you are OR you can tell yourself that you are mastered by nothing but God.
Don't blame God for creating you in a certain way. He has created you this way because you were called to do something that only you can do for His Kingdom.
