This discussion actually lead to an awesome topic: define your bad boy/girl. And once you define what attracts you there, then you know exactly what you must not date!
So let me try:
Military types most definitely (this does not mean they actually served), very manly, muscular, wide chest, short hair. Attractive to other women, but kind of a loner. Mysterious type: a dark stranger that would take me away. There should be a sob story somewhere, perhaps a bad childhood, him being the black sheep of the family. So it would be the two of us against the whole world.
And this is, dear ladies and gentlemen, why I should not date, not any time soon.