Generally in a personalized fashion site I'd like to see the following:
* an up-to-date sense of fashion
* An appeal to cosmopolitan styles
* Accessibility to the fashions offered (Amazon, target, AE, Aritzia, etc... links at least) I'd say it's best if you offered a deal finder and had your reviews tell people what is hot and cheap right now.
Fashion is closely linked with afford-ability.