oddly no media specifically cracked my egg. instead i used to watch a lot of reddit memes to help me deal with internalized homophobia (onetopic and the click specifically,) while simultaneously writing a ton of fanfiction with a certified Cool Dude protag that was in retrospect an obvious self insert.
Then after a while of watching trans memes, i suddenly switched the protag to a Cool Girl in new stories, and after a bit realized my protag was, in fact, a self insert, and i was, shockingly, trans.

Nowadays im more enbie leaning, but still def transfem af lol