why do woman want bad boys but not nice boys?

Its complicated. Women don't like guys who are jerks to them. I like aggressive guys because I'm aggressive and because they seem to stick up for you more. There is also the reason that when a romance book comes, the guy is always a jerk at first but then the girl changes him. I think that is what all girls are hoping for. I don't expect this. I just want the best of both. Sweet romantic spontaneous but likes to do stupid stuff and is solid. It makes girls feel good to know that their bf can protect them.

I think this is a misconception. That women somehow like it when guys are jerks to them or other people.

Women like confidence, confident people a lot of the times are assholes to other people. In fact to be a jerk, it's almost a pre-req that you be confident enough in yourself to tell other people off and not be timid or shy or afraid of what others think about you. So really it's that assholes share the trait women like and not that women like awful people.

You may be an awesome guy, but if you're timid or particularly shy you're not going to get a lot of girls. You don't have to be a jerk but just like girls put on makeup and show off some boob to attract you, you need to approach her and show some backbone to impress her. Doesn't mean you have to be a jerk or awful person or women are looking for a d-bag that they can change.

For me usually the bad boy puts on the show he's bad, but in all reality is the biggest teddy bear. And as one mentioned women like confident men we want a guy that's not afraid to go after what he wants, or for a Man to stick to his guns. Usually the bad boy is very protective and great in bed

You answered your own question. They expect that being with them will cast the spell that's going to change a man. They can't resist trying to "mold" men into their idea of what a guy should be. That's why they love bad boys, they think they can change them.

I think for some women they think they can change a bad boy. A lot of women need someone to take care of so they get with a guy that has issues, so that they can try and change them, and take care of them. I don't know why women do this. But I think it's the same thing for most guys as well, men will look over the heavy set girl, or the average girl who would treat them right to get with the hot one that knows she can do better, and will treat him like crap. Maybe your just looking for the wrong women.