I don't know many of the brands mentioned in the forum. I guess they are popular in North America, where I suppose the majority of you live. In Scandinavia, we have other brands, which you probably don't know.
I am not used to talking so much of brands as people do in this forum and in many other blogs. Where I live, people seldom mention brands or designers which they themselves or others wear. Good qualities are appreciated, however. And what is often commented is someone's "personal style", "good taste", "overall great look" or "clever use of colours."
If I see an outfit or an item I like - in this forum or any other place - I will just use it as an inspiration and find something similar, often at a much lower price. Funnily enough, people have often commented that I look "expensive" and "stylish" when I am wearing clothes that are thrifted, inherited and/or found at an inexpensive price.
In my opinion, knowing which styles, lines and colours work for YOU, and knowing how to style items in a way that feels and looks right to YOU, is much more important than which brands you wear.