Rawrly saidYou mean her. The reason why some transgendered people seem to follow a caricature of their target sex is because they've been conditioned since infancy to follow what they were assigned at birth.
Actually, I'm referring to people who had voluntary reassignment as adults.
Many f2m's try to put on excessively macho airs (the kind most people would find repugnant in normal men) and many m2f's tend to do the same with regard to femininity.
Admittedly, these days I see more transgendered people that don't have clear gender identities (predominantly f2m's who self-identify as "gender queer" in my experience), but I wouldn't say that they are the norm and even in those cases the transperson in question often seems to have... complex... conceptualizations of how sex relates to personality traits (the upshot being that they think it needs to at all).
When we're talking about voluntary adults who undergo sexual reassignment this isn't necessarily that surprising. The surgery (and hormones, etc) are expensive, painful, laborious and can usually only give an ersatz image of the desired sex. For a large number, if not most, adults doing this they are essentially choosing to have physical qualities vaguely like another sex, at the cost of personal health and bodily function, because they feel that their "gender" is "mismatched". That requires one to have a very
strong commitment to the idea of sex-gender coupling. (This is almost the opposite of the increasingly more common opinion that sex and gender can or even ought to be separate.)
[Note: I'm aware that there are many different reasons for undergoing sexual reassignment surgery. I'm merely talking about the thinking of a large, but not all-encompassing, group of those individuals.]