with comics,, bad fonts???? and like, "each character has their own font" type deals.
ugh, i just, can't read those. it's a huge distraction from the story for me
with series (anime, "normal") it takes a bit more to get me to quit but if i don't like the way the main actors looks (especially things like piercings, i dont know why, can't stand it), or "all toddlers" series where everyone's a college kid or younger like. listen, im gonna need some characters who arent striaght up children (*sidenote 'all toddler' series applies more to normal ones than anime because almost all anime is all-toddlers)
with anime i also almost always avoid self-describing "horror" anime becuase it never, ever lives up to the expectations and always feels very lukewarm. id rather have my horror in manga form where there's a lot less limitations lol