GOOD: One color hair (green, blue, purple.) with fashionable but otherwise plain clothes (meaning don't have neon green hair and wear multi colored clothes, this makes you seem like you want attention, not you just like green hair)
Extremely well cared for hair, and you MUST HAVE significant bangs to pull it off
BAD: 4 or 5 different colors of hair, gothic pants with chains hanging off, and a rainbow shirt.
Messy tangly hair with a middle part. Ughh.
I see the latter all the time, makes me want to puke
I think dyed hair looks hot on some girls and its a turn off on others. It really depends on the girl. If you think that you can pull it off then go for it. It will definitely catch my attention, but it sounds like a lot of other guys think its a turn off.
They definitely would catch attention. For some guys, like the ones that have already left answers, it is a turn-off. But, there are those guys out there who like it and may even have coloring in their hair. I would have to see the colors in the persons hair in person to decide if it is too extreme and desperate. I think people who put colors in their hair are daring and bold. I would never be able to do something like that. I really think it looks neat on some people, but others it looks a bit odd.