complete lack of care about my own appearance (recently realized that while becoming a big buff muscley man doesn't appeal at all, becoming a visibly fit woman sounds pretty alright to me)
always been uncomfortable within my own body/skin (too big in the wrong places, too hairy)
a lot of longing for transformation/shape-shifting abilities (Christopher Paolinis Inheritance series goes hard about magic enabling elves to be exactly as their heart desires)
upon learning FtM transitioning was a thing, absolutely confused about why anyone would ever WANT to be male/masculine
started speaking a lot less after my voice literally changed overnight, no periods of cracking voice just immediately deep (it is irredeemably masculine and i hate it)
Edit:
Oh and can't forget
never being comfortable being shirtless, even as a prepubescent child.
And (edit2)
giving up and growing a beard because trying to keep my chin clear of hair is borderline impossible.