Personally I hate guys wearing white rimmed sunglasses or popped collars...Every guy I've met wearing them/that has been a tool so I now associate it as a bad thing. Also fake bake tans on men and women. If you go tanning bed, but it's just enough for color, but I can't tell you did it fine. If you're obviously not that orange of a complexion hell no it's just gross. It's the worst with Caucasians because it just looks off if the skin is too dark from tanning...I like when people match their ethnicity.
The stereotypical douche wears big sunglasses with a dress shirt to a casual event. He's trying to look clean and dressed up (to say heh look at me I have money), but flashy and casual at the same time (again to say heh look at me). He can't just relax and cool out, he has to "act" in order to grab attention... They always fall apart in the presence of real confidence though. =P