It's really hard to go wrong with some nice soft and subdued window light, a Rolleiflex TLR, and a roll of Fomapan 100 speed film. In fact, I would say the biggest challenge to such a situation is knowing when to stop exposing frames in the camera and to call it good. I would probably be content just having the model sit there for hours and hour while I photograph the scene from every conceivable angle. Sure fun for me. Probably fairly boring for the model.
For this particular session I wanted to keep the final images a little more on the abstract side of things. I typically find this most enjoyable when working with square frames as I feel like the 1:1 aspect ration really lends itself toward compositions that are all about lines and shapes. With the Rolleiflex this can be a little challenging because it doesn't focus quite as close as I would like it to and parrallax is a bit of an issue, but with a little patience and thought, both are problems that can be easily overcome.