Stay true to yourself
If you don’t wear a suit and tie every day, then don’t wear a suit and tie! (unless of course you need to/are required to); here are some other great options to consider:
Things that typically look great in photos:
layers - jackets, blazers, cardigans, vests, etc.
textured tops or blouses
button-up shirts with small plaid
women’s tops with small patterns (avoid large patterns or stripes)
accessories (lapel pins, earrings, necklaces)
colors like black, blue/navy, gray, beige, and jewel tones
Things that don’t look great in photos:
reds/oranges or any similar color that will reflect back on your skin
bright white (unless it has a texture); bright white is ok if you have a layer over it
Transitions lenses (if your headshots will be outside); also blue light glasses will show blue/purple in the photos with both natural light AND artificial light (flash)
inexpensive cotton clothing (generally try to avoid cotton when possible for photos)
clothing or trendy items that will date your photos (ie. 70s bell bottoms)