How could believing the christian story of creation affect a persons attitude to the world?
I believe one of the biggest ways is our attitude toward human life. To the evolutionist, human life may be just another form of life and thus does not have any intrinsic value over other forms of life. This can lead to euthanasia, murder, abortion, making animals rights too important etc. If we believe that God created all and that man was the highlight of his creation, and then after we messed up our relationship with him, he then died for us to restore that relationship, we can see that we are extremely(!) important to God. That can change everything in our lives.
