obviously what you do is seduce the rich guy, marry him, divorce him later and take half his assets with you, then marry the nice guy and have his children
but really, who knows? everyone wants something different. it's not a matter of the generic "one". one size does not fit all (oh... that can have bad connotations)
plus i think people have this crazy notion that they can change the nature of another person (anyone seen 'the shape of things'?) if a girl dates a rich jackass, it's not necessarily because she's solely attracted to jerks (though she might be. put her in therapy and find out) its always possible that she stays with him because she thinks she can change/improve him. what are the chances of being able to change the nature of a perennial sleaze? it's paradoxical.