I don't think there is anything strange either about a woman acting in a forthright, rough butch way - or, as Vox pointed out,a ladyboy showing that side. I never subscribed to that all women have to be lilies. But I do think there's always some fields of expectations of within what range a woman does act/should act, and the idea of what is normal/what in fact happens and what is "natural and fitting" mostly gets blurred in these issues.
So gender ideas, male and female styles is something that happens between individuals and the people around them, and their culture. It's not feasible to act like you had never heard of, or thought about, what women and men are expected to be like in the time and country where you happen to live, unless you have inherited money and can afford to live without adapting to anything. Now that doesn't mean that women or mtf trans girls always must bend to the mainstream ideas of femininity - of course not!