it's kinda true you know..
i'm not usually one to consider superficial behavior.. but when attracting mates it does make a difference.
a female friend of mine once told me that a big thing she noticed about a guy was his hair, and it was somewhat important to whether or not she would ultimately be attracted to a guy.
they say that most women can tell within the first few moments of meeting/seeing a guy, if there is any possibility of a physical relationship. and with most females that I have mentioned this to, they seem to agree. and I think the same goes with guys, (although we are generally more adaptable ;p)
first impressions are important, and usually the first impression you can make onto someone in a face to face situation is a physical impression.
you don't have to portray a style that doesn't fit your personality.. in fact that would be a mistake. the trick is to find a style that suits your looks and/or personality.
anything other than that will only serve to work against you.