I have that experience too: Going shopping for clothes (wanted the "girl" stuff, hated the "boy" stuff, ended up with the neural plain stuff). Why talking to girl was so much easier then talking to boys. My preference in movies, tv shows, music, books, games, etc and why men tended to react the way they did when they went over my collection. Why I sometimes, when I was alone, tried on my mother/sisters skirts, until I grew out of them. Why people often thought I was gay. Why I knew the names of all the fashion designers and many of their collections (long before I knew anything about trans*, GID, etc.) How I tended to be very precise with colors: like aubergine, pine, turquoise, etc. How I love (watching) ballet, figure skating, etc and wished I could be like that girl... Why I always stole all the girly things from my (12 year older) sister. The mild dysphoria every time I saw "mr. MyLastName", to the point where I asked if they could just use MyGivenName MyLastName, they couldn't and their reaction made it clear that one does not make such a request. Even why my bedroom never look to belong to a boy and always tended to look slightly feminine...
Some how my life makes sense now, something it never did before.