In the artistic composition that is you, what are the dominant characteristics? They may be things that create the most challenge for you; they may be your greatest strengths. Those could be the same.
For example, today when I saw myself in the yoga studio mirror, I noticed something I hadn’t really noticed about myself before: my outline (silhouette) is comprised of short, broken lines – straight and curved – in combination. Even my shoulder line presents such. In the past, I always saw those curves as bulges; but, in reality, it is simply my design pattern.
In principle, the concepts that are likely to yield the best return aesthetically are, IMO: silhouette, length proportion, color value contrast, and style personality. Identifying the first three can be done inexpensively from a photograph.
I am still trying to develop/adapt a diagnostic instrument for what is arguably the cornerstone of personal style: personality.