1. First and foremost is Geographical location. No matter how popular a fashion trend in Los Angeles may not be appropriate is a small prairie in Wyoming.
2. Ethnic background. A popular trend in New York may not be a popular trend in Saudi Arabia even if both were designed by same designer.
And even if they live in the same community. A traditional christian differs from traditional Islamic culture.
3. Age background of the population. If there is unusually large population of older people, they may prefer a conservative clothing in their community.
4. Social activities of the people. Is it fishing or skiing?
5. Economic condition. Is it an affluent community, middle or poor community?