While chatting with college friends years ago, I was surprised and semi dismayed when they told me that I acted differently depending on what I was wearing! I was nettled that my personality and interactions with people could be influenced merely by the clothes I wore. I pondered the matter at length and have since dressed with that in mind thinking about how I want to feel and how I want to make other people feel. Hahaha, probably not everyone has to consider these things, but when you are like me with a natural penchant for bold and unique get ups, (at least relative to people and environments I commonly encounter), you have to consider these things. Now, in fairness to myself, it is likely that they felt different about themselves and about me based on what they were wearing and what I was wearing at any given time and that probably influenced their perception of me. All of that to say, your image has an impact on your own self and those around you and plays an undeniable role in communication.
What is a person's image? I think of it as the composite of style, grooming and communication (including body language, etiquette and personal details), that people encounter and that play a large role in how people perceive, feel about you and themselves and concurrently react to you. You can easily learn how to make a positive impression, but that being said, know that it is your character that will maintain, build or undermine it going forward.
The fabrics, colors, cuts of clothing, logos, scents you wear, in addition to your mannerisms, eye contact, speech, etiquette, posture along with a myriad of other elements work together to create the impact you have on people. And of course, keep in mind that the signals you send will be interpreted differently by each person depending on their own unique lens through which they view you and the world.
On some occasions you may need to make an impression that you are competent, confident and a force to be reckoned with, at other times you may want to seem safe and dependable, still at other times you may want to take the spotlight while on other occasions you might want to seem accessible or conversely you may not want to draw attention to yourself at all. It is important to be cognizant of the impact your image has on people and situations. As much as I am a proponent of being free to be yourself, I encourage people to be aware of the implications your image will produce.
All things considered, your greatest image asset is thoughtfulness about the people you are interacting with. People care far more about your character and how you treat them than how you are dressed.