I have a number of clients that are in need of a photographer to take a professional photograph of them for their business. Most of them are looking for the conventional head and shoulders executive head-shot / portrait. If they have a few extra minutes I like to take a variety of photographs of them to give them options for future use.
Clients appreciate having a number of different photographs of themselves so they don't keep using the same photo for different occasions. Frequently they are asked to provide photographs for speaking engagements, articles they may have written, etc. and it is nice to have some professionally taken photographs at their disposal.
Last week I photographed an executive who needed just a single head-shot. We were having a good time we took about 15 minutes and we took a few more photographs that he can now use for future needs.