We all have our turn ons and turn offs, so... The ones that don't appeal to me will make me move over to something else rather than finish reading. I'm not an AB or a sissy, I'm not into roleplaying or dressing up, so those things will make me move on.
I'm tired of stories where the main character is a "really pretty girl who's kinda small for her age", too, so. Yeah.
And then there's the quality issues. A lot of stories out there aren't written by people who care about writing. It's a sad fact. Far be it for me to judge too harshly; I haven't published anything here, but for something to be worth reading it has to be up to a certain standard. The plot has to be well thought through, the characters believable and refreshing and the grammar up to scratch.
Writing isn't just something you sit down and do one day, it takes time and practice. However many diaper changes you insert into the plot.