Most Helpful Girl
Most girls don't want nice immediately. Most girls want a project. Someone who's a jerk, that they feel they can fix, or flaunt. Most girls like drama in a guy, because being upset about something is a lot more emotional and entertaining than constant happiness (and for many women, emotion typically comes before logic).
Eventually those girls get tired, and realize that a guy who is not nice is way more exhausting than one that is nice. Some girls reach that point early (20's-30's) Some girls don't get to that point until they're 47, going on their 3rd divorce.
Then there's the ones who never went through a "Bad boy" phase and never will. They usually find a sweet heart early.
All you can do is wait.
Most Helpful Guy
We kind of don't until later on. Patience pays off in the end, so I'm told. Women are notoriously into smug twats with a daredevil complex. My own mother is into one - the best of it is she'll try to justify everything about him, but at the end of it, he is still the blatant epitome of wankery that he'll always be. Sexist, ill-informed on any topic even remotely thoughtful and even just plain disrespectful to her. But that's what's hot. x) You'll find someone, just don't let that patience waver else you could end up with a twat, yourself. Often overlooked, the scenario works both ways.