I don't like the North Face, yoga pants and Uggs look that every single woman in my area wears. It's awful, they're all clones. That's what you get for living in the most fashion-backwards city in the US, though,
I used to hate a lot of styles but hipster style has beaten them all in lameness and stupidity, I seriously can't even begin to imagine anything worse than that.. it's just awful! Maybe punk style (especially on girls) could "compete" in which is more disgusting but that's about it
By the way I LOVE girls who are tanned and with blond hair.. even if it's not real it looks so amazing!
Affliction, Tap Out, and Ed Hardy t-shirts on ANYONE is a negatory for me. I'm not a fan of skinny jeans on either sex. And I can't stand these weird shoe-bootie hybrids link I think they make otherwise normal looking feet look like hooves.
For girls it's definitely the sporty look for me too. I don't like seeing fleece, sweat pants, lululemon, etc. Also I don't really like the typical "stylish" look (black blazer, skinny jeans, flats), it's really boring and shows no creativity. But most of all for me are the guys in track pants (not the soccer ones) and sneakers, plus wearing anything with a brand/logo embedded on the clothing.