Personally, I have a bit of a thing for tough women, particularly ones that can fight. I don't mean the kind of "warrior princess ooh look at me I'm getting so dirty" fight, or even really being physically fit, but having the mentality that there's nothing that won't give way with some well applied violence. Could be simply my liking of action films and games, the romantic thought of "two against the world", or, and personally I think this is likely, that such a woman wouldn't NEED me. That if such a woman was with me, she wasn't doing it for security or that she was afraid I'd hurt her if she went with someone else, or that she needed someone and I was just there; That she actually wanted me.
Personally I find it's interesting to think about people's fetishes. It gives me hope that deep down inside, we're all freaks, nobody is normal, and thus the social order of things, the little dumb heirarchies, mean nothing. It also gives me hope for myself. If people can be attracted to cartoon characters, cannibals, even sh**, literal sh**, then maybe there's someone out there who doesn't only not care that I'm a horrifically ugly, insane, barely human abomination, but someone out there who's actually attracted to that.
Hey, don't flame me for that one! I was being kinda positive for once, although that could be because a tiny cut on my leg inexplicably bled a sea and I think I may be a little low on blood! I WAS BEING POSITIVE!