If I am being honest, I think that it would do a lot of people, cis and trans, to let go of the socialization issue.
Yes, I am not cis. But my socialization has nothing to do with that, and my body has everything to do with it. Biologically I am, and always will be, transsexual. I will never be male, in terms of my sex. My acceptance of my "difference" ends there.
I don't believe socialization forms our interests, behaviours, etc. It simply encourages some and discourages others. I love to use the example of myself and my brother, because we grew up so close in age, and emotionally, we have a closer bond than most siblings. When my brother was bullied, his socialization was to punch the kid in the face. When I was bullied, my socialization was to be a bit more delicate about the entire thing; avoid the bullies, make notes, tell teachers, etc.
My brother did snap once and shoved a kid in a locker. But he's never used physical intimidation since. He could have. It would be encouraged and supported. But what ultimately empowered my brother to stand up for himself was watching Oprah, and learning to believe in himself and what was important to him. The way he asserts himself is very much through words, and if you didn't know it was coming from his mouth, you'd assume it was a woman saying it. If he were to transition to a woman, I honestly believe that socially, he'd blend in seamlessly (physically...it could go either way lol). He can hold his own with cis women way better, and it took him forever to form any kind of conversational bond with a man. He's chosen his whole life not to fit in and to be who he is, regardless of socialization pressuring him to do whatever. He's also sick of people telling him to "just become a woman already." He's not a different kind of male because he chose to embrace his "feminine" ways early enough in life for them to come naturally. He's a cisgender man (unless he has a surprise for me!

In which case I will support her as she always supported me)
Take me. I was encouraged to do the opposite of my brother; improve my self-esteem, not fight, etc etc. I
chose to do that. Consciously. I wanted to fit in. Socialization only encouraged me to do it. Just as socialization encouraged me not to watch certain movies, certain comedians, and talk about certain things. I remember one time where I was read as cis and the guy was like "just like that Dane Cook skit, you remember that, man?" I didn't know what to say. I never let myself watch Dane Cook because that's what the men I knew did, and I didn't want to tread too much into "male territory" because I didn't want anyone to know the truth about me. But you know what I thought? Those rules never applied to me in the first place, but because I wanted to fit in, I chose to avoid it. If I want to, I can find all Dane Cook's skits, watch them, and then form an opinion. If I like them, I can talk to the guys about them with just as much fervor. If I don't like them, I won't do that, but I doubt it will be because of how I was raised. It will be because of my personal tastes and preferences.
Socialization, I believe, at the end of the day, is self-imposed. Yes, we're pressured to do and be X Y and Z because of the sex we were born as. Some of us were comfortable enough in that role to continue with it. At one point in my life, I took on "feminine" behaviours and things that both liked and hated. I threw away the ones I hated, and kept the ones I like. I may have been discouraged from liking "male" things, and I chose to allow myself to be discouraged - and I tell myself now that those things deserve a chance too. Some of the "masculine" things I like have now become a part of my personality. If I don't like them, they get discarded.
I guess what I am saying is none of us should limit ourselves based on our socialization and our comfort zone. It just encourages cis people to limit us as well - to say "well that woman wasn't born a woman, so she can't
get us and our experiences and our way of being." Or "that man was born a woman, so he must
get us because he can talk to us much easier" (and yes, cis women have said that to me - some even assumed, even though I passed to them otherwise, that I was FTM because of certain behaviours. how offensive!). That's not necessarily true, for one - some trans men blend in better with cis women, some don't. Some trans women blend in better with cis women than others. For another, who cares if the style is a bit different? Why attach meaning to it? I think we need to work past it as HUMANS, forget cis and trans - not shutting people out or treating people differently because they communicate in a way we are not used to or have interests we are unfamiliar with. It's self-limiting.