Ahhh, the cry of every "nice guy" out there.
Gentlemen, women DO want a nice guy. But they also need to see more than "nice". Many women confuse these other characteristics as desirable, but in the "bad guy" package. They put up with the bad on the assumption they will change them (btw, this is also part of the appeal for the immature woman).
Women want a little challenge, and they want self-confidence in a partern. The "jerk" puts out a vibe that he is not desperate and that he is not overly needy (i.e. he doesn't really care). You CAN care (you're a nice guy, after all), but you need to both hold a reserve, and be prepared to walk away from a relationship if it doesn't work out. Don't compromise at the start. Be yourself. And LIKE yourself. Women will be attracted to this ability, even if you are a "nice guy". So many "nice guys" rush in with too much attention, too much willingness to 'bend' to impress a woman, and too much "need" in their manner.
I demand that someone approach me on MY terms. I am who/what I am. And if someone doesn't like that, I'm really ok with it and it truly doesn't bother me. I POLITELY send them on their way. They often take two steps, and turn back wondering what the hell happened. Back when I was a little more promiscuous, I slept with quite a few women who didn't like me, but were so intensely curious that they had to find a way "in" (and I stated that sex was their only option).
Add to that the power dynamic I demand, and I'm unusual (even if I'm physically plain) as well as self-confident. It's a powerful combination. Of course, once they are in bed, the power/sensual games and the brute honesty works on them further ("I will be doing this to you, and, my dear, you have the choice to submit or there's the door...now if you choose 'yes', then put the cuffs on your own wrists and wait for me").
I am never a "jerk". I don't lie to them. I don't play games. I follow through on my promises, and am not afraid to say "I cannot promise that.". I don't do lies of omission and I know myself well enough to be confident in this. My affection is genuine when it's there, and if it's not I don't string people along.
That is what women keep saying they want in a "nice guy". A guy who will call, be honest, and like them. But they want the rest too...someone they can't easily manipulate or compromise, someone with a "dark" edge, someone who will make them curious and feel feminine and desired...and even a little afraid from time to time, even if they won't admit it.
-SB