Let me tell you why I like shooting with them so much. They bring it.
They are preform for me, and I get to take pictures. Just stay tuned for the rest of this post and you will see.
*Something I have learned about photographing people: give opportunity for people to be themselves. Facilitate the photo shoot but don't be afraid to let them get creative. Some photo shoots you need to control more then others, but sometimes, its good to just let the shot happen, and then you be there to capture it.