I think a valuable distinction can be drawn between the Batman type and the Wolverine/Gambit type, and that distinction is Bruce Wayne. Batman is dark, lonesome, brooding and mysterious, but he's also rich and classy - he's your classic "tall, dark stranger" while Wolverine is the guy in leather ****** on a motorcycle.
Let me preface this by saying, IANACG (I Am Not A Comics Geek), so I'm going by the better-known lore and might be missing some important data.
However, what you say is true -- Batman has the added bonus of being rich, while Wolverine has the added bonus (to many women) of being dangerous. But still, they are variations on the same theme -- the tragic flaw. Something a woman can fix or overcome. The thrill of pursuit. (Women get off on that too.) Superman and Spider-man are both good boyfriend/spouse material as-is, but the darker heroes have something about them that needs to be dealt with before any romantic relationship can progress.
This is reflected in the stories -- Peter has Mary Jane, Clark has Lois, but Batman has...who? Vicki Vale, sure, but not for the long haul. He's not really capable of maintaining a romantic relationship. Women who love Batman want to "tame" him. Wolverine, however, is a man with unrequited love in his heart. Women who are drawn to Wolverine (myself included, though Spider-man is my one true love) are not simply attracted to the bad-boy, machismo persona, but also to the idea that he is capable of deep and passionate feelings for a woman even if she does not reciprocate. Wolverine-lovers want to heal his broken heart.
I'm certain there's a dissertation in here somewhere. Any Lit majors out there?
ya, but men don't get to be 25 until they're at least, what? 35? 40? dead?
I also have a theory that all men are seventeen from the time they actually turn seventeen until they get married. When they walk down the aisle, they resume the aging process at the same rate as their spouses. So Pedro's about 22 in woman-years. My friend, whose husband is ten years her senior, is actually four years older than he is, maturity-wise.