I wonder if there is a trend between younger and older transitioners? I transitioned in my teens and therefore never really attempted to be a man, and so didn't experience such a profound "switchover". Many older transitioners often report how they became much more what they perceived as feminine, emotional etc, and often assigning behaviours as "male" or "female" behaviours. For me, I assign fewer behaviours as gender-based, and while I was more able to express my complete self, it wasn't the clothes, makeup, shopping or other so called "female" behaviours that were the reason for my transition.
For a while, I embraced being a male who had these so called "female" behaviours, as I was deemed too young to make such a life changing decision, and at that time, I thought that maybe they were right, and that I might not be trans, but just "think" I am. However, I realised that I should have trusted my instinct all along, and it was simply something inside of me, telling me that I was female, that was the reason for transition. Nothing about not being "one of the lads" or anything like this - there are many men (and women) who exhibit behaviours and personalities atypical of their gender. They may even "think like the opposite gender" due to how societal norms impose a limited perspective on gendered behaviour. However, this does not make them trans. It may differ for others, but for me, the one thing that makes me trans is my mind telling me I'm female, nothing else. I actually fit in quite well into the heteronormative world as a feminine female, but this is merely incidental to me, I do not consciously feel like I'm "thinking like a girl".