Dress to fit the audience

Corporate businesses : such as finance, banking, accounting and law call for the traditional business suit. If you have an interview with a company and don't know the dress code, a suit is always the best option.

Creative businesses : such as advertising, art, fashion, marketing and entertainment allow you to express yourself more, including unusual colours, fabrics and on trend fashion. It does not mean wild and wacky. You want to come across creative but competent.

People-Oriented businesses : like teaching, medicine, social work, etc., call for business attire that both conveys expertise but is non-threatening.  Collars and coordinated separates are suitable. The goal is to look knowledgeable yet still approachable.

Presenting - when you are in front of an audience presenting you need to chose the attire to suit the event. You typically want to dress to fit the audience attire, so they can relate to you and feel at ease. Make sure you ask the organiser or research the event to find out what the dress attire will be. When in doubt, always dress up, rather then down. You can always take a jacket off to make it less formal.