I'm sure that if you'd asked for opinions on the story you could have gotten away with it in general discussion, or maybe even philosophy. Its definitely worth a shot, and the worst the mods can do is move it to subtalk;
well, that's not true, they could also BAN YOUR ASS, but the most they're LIKELY to do is move it to subtalk. I think its worth putting somewhere else. if its in subtalk, people will treat it like a subtalk subject; if its somewhere else, people will take it seriously, and that in itself will let it live up to whatever standards the forum has for threads.