Have you encounter such people in life in which no matter of what good you have done to them, they will never appreciate such  and show gratitude, helping them even will be seen as your own responsibility to do so, while they were there no helping other from their own little capacity, this is about pride to me, i see no reason for someone to help you out with something and then you refused to show your gratitude, will you be able to receive more for the next time?