So what... not about likeable personality? Just mindless sex? Okay I don;t have to mention characters like Alyx Vance, Zoey, Cortana, Ashley and others who I like for their personality and not just their looks and instead just talk about the woman in games who I'd hump a lot.
Okay then... Ivy from Soul Calibur.
She has a great full frame (though obviously fake) and she could rock my world. She also clearly likes it rough and wild and not afraid to be a little nasty. The whip the tight revealing leather straps. She's a dominatrix and let me tell you, I wouldn't mind being screwed by her. She'd do everything to me, whip me, punch me, burn out her cigarettes on me and spit in my face. She would let me touch her naked body while I'm tyed up and she gets to hit me with the whip afterwards and tell me I'm scum while I scream:
"THANK YOU!"
God the best sexual encounter ever.
...hey you asked for it, welcome to the dark side of Vrex's sexuality.
EDIT: Yes I am aware that this goes against my ethical beleifs in regards to women in games but hey if we are talking about mindless lust then I gotta go with a character with that in mind.