With a 5 way, white puts bright light in, black takes out reflections, silver, I find a bit bright for portraits and gold is fantastic for warming skin tones. The best bit of advice I can offer is to rope in a friend to direct the light where you want it. I like to try to pick up light in the model's eyes using one with some diffused daylight. Really good for adding that extra bit of light into shadows indoors. Experiment without the camera in your hand and just observe what happens to the lighting. Have fun!