The first concern for any manager or director is the lack of consistency of the requirements of your employee (not necessarily of the job because that can change depending on the type of position).  You want to ensure that they are looking up to you as leaders and role models as well.  Many times, it is tough to distinguish between a manager and an employee because they like to manage in such a way.  I think that you will find that there is a thin line that you should not cross as a manager and it could be detrimental to your visibility as a manager.  Notably, your employees will look up to you and you want to ensure that you do not make a bad impression.  It is critical for a manager because it will let them know that there is a distinction and you, as a manager, are taking that higher path that they can achieve.