Yeah, never take advice from a girl is rule #1. What they say they want is completely different most of the time from what they are actually attracted to. I have talked to girls about this, just for fun, and they get pis-sed sometimes when I tell them how we men are supposed to be dominant and in control of the relationship. I don't even bother arguing with them.... can't win those either, haha.
What they want, as it was posted on here in some other post, is a man who can crush them physically, intellectually, and emotionally, but at times be as gentle (some simile here I forgot).... that isn't the exact words, but you get the point. You basically have to DOMINATE. You should already be stronger than her physically (and of course they are attracted to physically strong men), and it is desirable to be smarter than her (although for some men this obviously isn't the case, lol), but if nothing else, you must be in control of your own emotions, and to a certain extent, hers.
A typical niceguy is respectful of women, afraid to touch them even, very accomodating to the women, and no matter what his real intentions are or how he just wants to be nice, it is likely that the woman will see him as weak, submissive, and at the worst, a pushover. Women don't want men they can control. I am telling you this because if you are nice to the extent where women control you and you don't do any of the controlling yourself, you're a nobody to them. I am a nice person, but I know that hot women require a little bit of attitude on my part before a.) they even notice me and b.) I get them to reframe their mind so that I am seen as equal or superior to them. Treating them nicely would not have much of an effect, especially since most nice guys are afraid to teasing. How much can you tease before being a jerk? I don't know.
There are many attractive qualities in jerks, and being nice has its value as well; find a balance.