Some women devalue themselves in a man's eyes by putting themselves down and telling him all their bad points up front. This is not a good sales call and will not get you the guy. Present your positive points in the beginning and don't show the negatives until your relationship is strong enough to cope. This means not spilling your negative emotions, including how badly men have acted towards you in the past. Present yourself as a quality woman who is in control of herself because she doesn't put up with other people's bad treatment or let herself be taken advantage of.