Are you saying the Spies don't have personalities, because that would be silly.
I actually prefer Sam because of her personality, intelligent, educated, sensible, cultured, polite, respectful, classy, well-spoken and her being beautiful and having dat voice is just a bonus.
If I was going for pure looks I'd go for Mandy.
Sam > Alex > Britney > Clover > Mandy
Mandy > Britney > Sam > Clover > Alex