Harry Potter & Future, Family, and Magic

The Dark Lord is dead, Wizarding Britain finally freed from the clutches of Lord Voldemort and his Death Eaters.
Harry Potter realized that he is no longer bound from manipulations of puppet masters, the horcrux in his scar unbound something in him that he didn't even know was shackled. He finally starts to plan for the future.
He is not going to be the Golden boy of Gryffindor now, deciding to pursue excellence in every facet of his life, particularly personal and professional one.
The future of Wizarding Britain will be up to him to shape now, and it will require a Slytherin approach.
Past secrets will be unveiled, personal relationships will be tested. His friends and the people in authorities will start to question, did we ever know Harry Potter? And why does conforming him to his previous standards seem like a bad choice to make.