I Don't Care What Others Think of Me

I know for a fact that we CANNOT please everybody... so why would I bother trying to please all people around?? I do what is right according to my beliefs and teachings.... those who have same belief like me will like it, while others may or may not... why should I care??
I am not saying that I go kill or hurt people just because I feel this is right!! this definitely is NOT right.... I am just talking about personal aspects in life and daily routines :)