They started to create more female heroes with varying shapes and personalities due to criticism, especially by feminists (it was constructive though)
However, the only actual manly female hero is Zarya. Brigitte is still obviously a girl in a heavy armor, which still puts an emphasis on her femininity by making her armor hourglass shaped.
What you experience is completely normal. After all, your personality affects your choice of character.
This video of game theory uses an own survey with over half a million of participants. They concluded that your personal traits, like your gender and nationality, do have an impact on what character you choose. Women tend to pick characters who are “traditionally feminine” instead of chracacters who don’t look like that.
This is all due to the similarity bias. Your preference on a character depends on how similar they are to you, too. It has the most impact when choosing your hero for the first time. For example, I have a heavy similarity bias in terms of personality of a hero. Being goofy and optimistic myself, Tracer with her uplifting attitude intruiged me first. Of course, you can disregard that similarity bias and focus on gameplay only.
The character designers don’t create heroes outside of the “traditionally feminine” asthetic to please the female audience. They do because they can now. They got more creative liberties to create more interesting heroes and, let me tell you, they did a great job. Moira is, without a doubt, one of the best examples on how to use gender itself to present a character. After all, you actually couldn’t present the same personality as well as if Moira was a Man.