Generally shoulder length hair but depends on what you are comfortable in and can pull off.
For example, something recently that I found attractive when I was watching a show, was this girl that had a ponytail with bangs or side bangs; not sure what to call it but there's still some hair in front that can be styled.
Another style I find attractive is those soft curls that look kind of wavy - like gnargnar described.
Regardless of the hairstyle, dry or damaged looking hair, like it's been burnt or something, isn't very flattering.
i like it around shoulder length but I can vary I don't like pony tails much but I like the look where it's like straight and it curls out at the bottom. I also like where the curls like twirl down in sprials
Alright, I'm not a guy but it's been my experience that guys don't really have a preference for style as long as the length is long enough. I think they seem to like wavy, beachy hair usually when it's sunbleached to where you look like a surfer girl. I've had probably the most attention with that style and color. I think it's just what suited me best, so it's the same with other girls. Whatever looks best on them.
Well I have kinda long hair (almost to my breast-line) and I wear it wavy, straight, curly, etc and my Boyfriend says he likes it no matter how I wear it, but he prefers long hair instead of really short...also I believe long hair is more feminine.
I read somewhere that most guys like girls with medium length straight hair as in a few inches below shoulders because it's the most playful of all hairstyles