It's certainly true that I'm a conformist so I tailor my presentation to "fit in" while keeping as many individual details as I can. But as to which gender presentation would be most comfortable, the only answer I can think to give you, is to try out a male presentation and see how it works and feels. It's sort of the same advice I'd give someone who was female-assigned-at-birth who said what you said, that they felt they should be a boy.
Based on your story, a question arose. Feel free to ignore it if it's not helpful, but have you looked into whether you might be intersex?