All Presidents are concerned about their legacies. Having essentially reach both the pinnacle and end of public meaningfulness, the tend to worry about how history will remember them. In this it is logical to conclude that Obama is more concerned with this than most of predecessors.
Presidential Legacies – Bush vs. Obama
Of course, Obama is also in the lamentable position of having his legacy tied tightly with that of his immediate predecessor, President George W. Bush Jr.. This will cause the boy’s legacy to be compared to Bush’s.