i don't buy a certain specific brand. i tend to buy clothes with which the design suits my current clothing and looks good on me. however, generally, the type of clothes that tend to fit my style and fashion and that i have the most of is probably ralph lauren polo. i find the material to be of a high quality that you would expect with its price and the styles to look good.
I own a lot of express work clothes because they sell LONG work pants that fits me best, then I also have a bunch of CK and A&F clothes...my favorite would probably be Burberry though, i love their pattern the most.