I don't care what brand really, what I mean is that I'm not concerned with people thinking "ohh lala he's got expensive clothes"
What really matters is how well something fits and if a company makes shirts and pants that fit my body consistently. Currently (and for a while) that company has been Express: all of their shirts, pants, suits, etc just seem to fit perfectly. Their clothes prices are very reasonable as well for the quality, especially when you take advantage of the CC or many many deals they always have going on ($50 off $150, $75 off $200, etc)
When I'm not wearing Express stuff I like to wear graphic tees that really represent the things I'm into. It's always a conversation starter and lets others know your interests, which I think is quite important.
I'm also currently in the process of learning how to tailor and sew a bit, it's a very valuable skill. I was motivated to learn because I can't stand when I really like a piece of clothing but it just barely doesn't fit right.