Samus is one of those primordial, archetypical characters who, due to being thinly-sketched at the outset and rarely elaborated on, fans show a high degree of individual ownership over. Interpretations can vary wildly between fans, and are often at odds with the supposed Canon. Having spent far more of my digital life in the metroid fandom than is wise, I've seen more than enough petty squabbles and debates over the character: "Oh, she's too talky in Fusion." "No, she was too quiet in Dread." "She's too floaty in Super." "No, she's too smooth in Zero Mission." "Let's make her hunt bounties for cash." "No, she doesn't do it for money." "They made her too subservient in Other M." "Yeah, but they also made her too badass there too." "She's 6 foot 3." "No, that's just in the suit." "Your fanart is too horny." "Why did you draw her ugly?" etc. etc. etc.
(Being constantly hounded to meet all of these contradictory demands, if nothing else, proves that Samus is a real woman.)
As for myself, this myriad of ambiguities, contradictions, and uncertainties is what makes her interesting. She can appear to be one thing in one context, and another thing in another context, and it's entirely possible for neither thing to be wrong -- they just hint at deeper aspects of more complicated and unseen whole, always in a struggle to harmonize with itself and the outside world.
I like how these pages from the Zero Mission manga put it:
Samus Aran is not just the woman under the armor. She is both the woman and the armor.