It is but natural to smile back as a response but other traits you mentioned are not easier to control and generally people hit back at the slightest provocation. It all depends on you how you cope with the unpleasant situation created by the weary kind of people who get easily worked up and throw tantrums without breaks. I have observed that if we do not retaliate immediately and respond slowly and calmly, the other fellow listens to us patiently and even agrees to our version in a given situation. This kind of control is not easy and one has to practice a lot to gain mastery of emotions. It has also been observed that generally spiritually minded persons are well behaved and they keep their emotions under control. Immediate reaction is not shown at all, rather a very tolerant attitude is reflected by them. I think one of the positive effect of religion is that we are filled with a very vibrant affection which is inculcated in our whole personality. As a result, we do not agitate at all and no one can instigate us to go beyond our cool demeanor. No only do we maintain our cool when provoked, we do not get disturbed at all even in very distressful situations. Since action and reaction is the play of the mind, when given a free hand, the mind plays an havoc with our lives making it very miserable. In such an state, mind cannot tolerate even a mild frown and it provokes the person to such an extent that he is filled with a full rage and causes unnecessary trouble for himself nand others. On the contrary, when mind is firmly controlled, emotions also remain well balanced and the person also remains calm and balanced. This is not very simple but with a constant practice, a person becomes adept. When a person becomes very skilled, he can convert the anger of other person into silence, the rage into calmness and the force into submission. Such a person is a real avatar of forgiveness and kindness. You will be amazed to know that when a person attains such mastery over his mind, his intellect becomes very sharp and he can sense the imminent possibility of any circumstances very easily. He can tackle whatever an adverse situation might be at hand. Such kind of mastery over mind is very rare but with sincere efforts , we all can become masters of emotions rather than their meek slaves. We go to schools and colleges and get education there but along with such kind of education, knowledge of mind control is also necessary to gain in order to behave in a very balanced way.