This is actually a really interesting point which i have never thought about, though i know i sort of "tilt" my head in photos and have no idea why. Though i mostly blame it on my hair that it sort of pulls my head to one side XD
But it could also be due to the fact that i dont "love" my face or facial features, hahaha... ive struggled with loving how my face looks for a long time but also that as i have gotten older my face has gotten "rounder" compared to when i was younger i always had a slim face. Of course this isnt something i get anxiety over or hate, but its just something ive noticed and never fully liked... but i just get on with my life anyway and know there is nothing i can do about it, so might as well embrace how i look instead of hate myself. (I am only human, so i am not going to lie about this. I preach body love, and i do love my body but there are somethings i accept and embrace rather than love, about myself). And of course i do struggle with low self esteem and lack of confidence, it was worse when i had depression (i rarely took photos then anyway and if i did it was always from a certain angle).