I guess Selina is every man's dream - who wouldn't want to have a sex-crazed nymphomaniac girlfriend. If I were to have a girlfriend/wife like her I would probably have sex with her day and night. At the same time, she's also smart and independent.
On the other hand, Lisa is also what every man wants - she's understanding, caring, independent, creative and reliable. If you'd ask me to settle down with someone, I'd choose her.
If I could find a combination of both Lisa and Selina, I'd probably hit the jackpot.
I guess many would find Jane the sexiest girl in the game - she's beautiful and she's got proper curves and all. Yet, I find Selena the sexiest - I'm just a sucker for redheads.