The answer to this question is subjective, as there are many professional golfers on the PGA Tour who could be considered nice. However, one golfer that stands out for his kindness and sportsmanship is Rory McIlroy. He has been known to take time out of his busy schedule to help young players with their game or sign autographs for fans. Additionally, he often goes out of his way to thank volunteers and organizers at tournaments. His positive attitude and willingness to help others make him a favorite among fans and fellow professionals alike.