Yes and no. Yes because others can often see things about us that we can't since we are not very objective about our flaws. So if you trust someone and they give you constructive criticism listen to it. No because as the saying goes those who mind don't matter and those who matter don't mind :) hope that helps.
No because then you will be living for them. It's ok to take criticism but for you to change yourself because of what people think of you is not good! Love yourself don't let others steal your joy because they think negative of u
Everyday tell yourself. "Im looking at my own goals" "I dont care what other people think, i am me" "I am beautiful just the way i am" - :D You should not care about what other people think. as long as your happy
Nah , it can damage your psycological health in many ways , depression , lack of interest and so on , also most people who say things about you are actually jealous , if they say your this , that , don't bother their oppinion isn't valid the only valid opinion of you is God's. remember , ignore them and be happy. ;-)