Yes, one of the single most important things when I look at a girl! Girls who dress trashy, or just like everyone else "because it's the thing to do" turn me off soooo bad. I guess it's shallow, but hey, being picky rules!
In a way, yes. I don't like guys obsessed with wearing only brand names like Abercrombie, Hollister, etc. just like I'm not really a fan of anyone wearing clothes plastered with the brand. But my style has sometimes been described as kind of indie...? I wouldn't agree, but I'll admit I DO wear a lot of Urban Outfitters, American Apparel, etc. :P And I tend to like guys who dress similarly. I find myself going for indie guys a lot, partially for the way they dress, mainly because it's different from what most guys around here wear.
I don't really care, to be honest. I normally am very dressy and wear a lot of dresses and high heels, pencil skirts, and my more laid-back look consists of dark washed denim jeans, a nice blouse, and flats with cute accessories to dress it up a bit more. My boyfriend, on the other hand, is more of a guy who will throw on any (clean) T-shirt and jeans. He's much more casual than I am. He was also very into the whole goth look when he was in high school. So we're complete opposites. I really think as long as the person wears clean clothes and can pull off their look well, it shouldn't really matter. The only exception to that is guys who wear their pants around their knees. I've never seen a guy who could pull that off. -.-;