In it’s simplest terms; you should wear what you are most comfortable in!
To be more accurate, it all depends on what you need and the purpose of your shoot.
While I do provide all my clients with a free guide to headshots, personal branding and portraits, it would still come down to you on an individual basis.
Everyone is different and has different requirements from what you want. So we would discuss this in advance of the session so that you’re fully prepared and comfortable before we even start the photo session. 🙂