My favourite brand is probably American Eagle. Not because it's popular or anything, I just love how the clothes they have look. But not only that, it's so much easier to shop for clothes there. I'm tall-ish, and on the skinny side, and a lot of their clothes come in weird sizes, like 29 (waist) x 33 (height), which fits me perfectly. Most stores don't have weird sizes like, soo most of my clothes come from there XD
Other then that, I really just pick out individual articles of clothing I like. I have a few from Hollister, Target, and just random places I happen to see things I like :>