Well, Samus is an object of sexual fantasies for many gamers I think, personally, I've always considered her as a strong and cold person, maybe haughty in a certain way (If we except her strange personality in Metroid other M).
Yeah. Even though I do think she's gourgeous...she's not real. :/ And I agree to a degree. Being a bounty hunter and losing people you love probably makes you feel alone and makes you grow cold. It's kinda the same thing with Master Chief. And you're welcome.