He is one of the finest and kindest human beings I have come across. When you meet him, you will understand why he is the Jackie Chan. It's not just for his work but also the kind of person he is.
Most actresses have multiple commitments, from films to endorsements, that require us to maintain a particular look over a long period. Hence, there is never an opportunity to experiment with hair, so we just settle for a neutral look that we can work with across projects.