i personally prefer writing in Ao3, even if i will get much less exposure. well, i do write a lot of questionable things that ain't allowed in this site and i feel sick if i have to censor some parts.
about SH itself, i'm not sure what to say. i don't really read the stories that much. even if i found something interesting, they often gets dropped with little chapters. while on the popular stories itself, i don't think i could ever stick that long either.
i don't think i feel secure about posting on this site either. i'm not really a thick-skinned person and just want to share what i poured my heart into. when i just be honest with my writing and wanting people to accept me as I am, this site taught me how wrong i was. and that's how i started writing moving to Ao3 instead.
i guess it also applies to every site with a rating and review system. not a fan of it, especially since you can't reply to the reviews. so others can just write things that are incredibly incorrect about the story and flaunt it as the truth, and they could even disable their profile if you want to clarify further.
the thing that makes SH better than RR is the forum and less toxicity overall, but that doesn't mean it's the place that makes me comfortable.
when it just some shit and giggles, i will consider, but if i wanted something a bit more serious--i think not.
overall, I guess I prefer Ao3 for posting stories. I like it when I can just write everything without feeling that I'm judged all the time.