P.J. Schwartz lives the life of a quintessential golden child. The Ridgewood fifth-grader is a straight-A student. He’s mature beyond his 11 years. He looks out for his two younger siblings and always makes his parents proud, his mother Kerry Schwartz beams. But there’s one area where P.J. consistently hears complaints, especially from adults. “Most people I’ve come into contact with say my handwriting is bad and illegible,” he told me, more amused than embarrassed. But it’s a weakness P.J. insists isn’t that big of a deal. So he fails to finish his “n”s, making them look like “r”s. So the top…