Hmmm... a lot of you seem to have had a tough time, and some of you can link it directly to your gender.
In contrast, sure my growing up wasn't all peaches and cream, but I really can't blame it on my male socialization.
This was because I figured out the 'rules' early on and by following them never encountered issues.
As an example, you know that silly fingernail test that runs around all elementary schools? Hey, look at your fingernails. If you look palm down you are a girl and palm up you are a boy. That stupid thing? Yeah, I made sure to pass it every time. I mean, that's a silly example, but it's one of many.
I learned what to do, what not to do, how to dress, what not to wear. Ect... I basically internalized the concept that femininity was a no-no and built it into my every action.
Now that I'm going to transition, I realize that I never actually disliked a lot of it, but I had just internalized the external expectations around me. Thus, socialized. But for the most part, even if I had transitioned early in life, I don't think I would have been a girly-girl most of the time, which is why I didn't feel such a huge problem with the socialization I received.
Yes, I was bullied, but that was because I was short and nerdy and when I was younger I cried a bit too often, but once I figured out how to control that, and once I got into High School I was quite popular among the general people. I could sit at 60% of the tables at lunch when it was filled with 400+ kids and instantly start up a conversation. I could always spot a friend in the hallway...
So, my socialization limited me. Yes. And I have felt far freer now that I have pushed aside those limitations, but I was not emotionally scared in particular from my childhood being socialized as a male.
How will it affect me? Well... I still am trying to release myself from the 'femininity is a no-no'... which sort of naturally broke itself anyways, but I still hit barriers mentally sometimes. Like, the color pink still puts me off sometimes, just because my mind says "Too feminine!" and warning signs go off... even though I already have plenty of pink stuff I love. I also think I'll naturally have some non-feminine or more androgenous styles a lot, just because it's what I'm use to, but I'm not worried about that.