There are a few different ways to approach this - bottom line, I think you should wear whatever best represents you and your personality. However, there is certainly something to be said about how well neutrals, blacks, whites, and earth tones photograph! Shoots with more than one outfit almost always include a variation of dressed up and dressed down options.
Flowy dresses that give great movement to photos, lots of layers in the chilly months for visual appeal, textures, accessories like flat brim hats, structured blazers, a good pair of jeans. For the guys, sweaters, plain white t’s, jeans and chinos, jean or leather jackets, I mean the list goes on.
I'm always here to help or give more specific suggestions if you need it!