Here's my very late impression on the matter:
Buying, supporting and consistantly liking a particular brand because of fit, durability, denim and dyestuff quality does make you some kind of brand whore, though you'll never suffer from it because you've found what actually looks good on you. There is nothing wrong with blindly buying a brand for these reasons, because you're familiar with how the brand looks on you and trust in the fit and quality. Reactions you get from yourself and others (i.e. compliments on your ass, legs, overall look, whatever) will be from real, permanent circumstances.
If I have one pair of Nudies that gets me tons of compliments, even though it's a brand no one has ever heard of (the only people who've ever said "Nice Nudies" have been men and I'm not out to get props from this crowd). It's just a nice fit. Am I a brand whore if I insist on buying Nudies in the future? Sure, I'm a brand whore, but at least I'm buying for the right reasons. I'd much rather hear someone say, "Those jeans look amazing on you," than "Nice Sevens."
Then there is the other: buying True Religion because you've heard the name mentioned in magazines or seen them on celebrities or because you want people to know you spend lots of money on denim. This makes you a tool. Any feedback you get from yourself or from others won't be from real, permanent circumstances, because they draw attention only to your lifestyle (I read magazines/I'm wealthy/I care about looking good) but won't necessarily make you look nice. Eventually people are going to realize how ridiculous these jeans look. When you look back at pictures of you going clubbing in 2005, you might think to yourself, "holy ass, what is going on with those jeans?"
It's different with women. Girls buy brands like Seven because they make their asses look good. Real good. Sure, they also tend to sport the overly embellished jeans with garish marks and such, but the basis for their brand support is the way it compliments their ass.