At the end of the day, what you wear is up to you, but here are a few pointers:
Bright colors are good, but busy prints and large logos take away from the subject.
Bare feet look more natural and relaxed in general.
Groups look better if they are dressed in similar styles and colors. For example, jeans and white tops or khaki’s and similar family tone of colors.
Most of my clients wear everyday clothes over dressing up so the photographs truly reflect who they are.
