What makes people want to go for the extra mile? Being a nice person is one answer. Another answer is because you believe that things can go well if you have good intention. While the sarcastic side of me believe in the saying 'the road to hell is paved with good intention', the bright side of me believe that people tendency is to be good. So if there is an opportunity to make everything right, why not go for the extra mile? To make everyone around you happy because you can.
I still remember in one of our first supervision meeting, my supervisors asked me what I want for my research. My answer was to understand how the world works, why people do things as they do. Both of them laugh and said, it is a never ending quest. Well, not surprisingly, they are right, after I finished my PhD, I have not figured out why things work as it is.
Not sure where life will brings me but one thing for sure, I want to be passionate about what I am doing and go for the extra mile because I care.