1. The challenges I encountered while taking portrait pictures were lighting, positioning, and DOF. While taking pictures the sun glared on my models face a couple times so I had to move my model to certain areas where he/she was exposed to shade which then resulted into a horrible background I couldnt use for depth of field.
2. The challenges of being a model was deciding what to wear for my next photo shoot. No im kidding I did not have any challenges being a model . I guess I am a natural .
3. I believe what makes a model a good one is expressing yourself in many different ways so that the photographer can shoot a variety of different styles of pictures. He/she must use depth of field to focus the subject and adjust the model if needed to.