Here are some tips on the sort of things we like in our stories and the sort of things we don't really like. Some of these are a little more written in stone than others.
Stuff we like
a good old tale of a character who wants something and tries to get it, meeting obstacles along the way
prose that grabs us and moves us and makes us feel for and with the character
supernatural elements. While we personally like a good serial killer or coming-of-age story, Dream of Shadows is all about that supernatural stuff
Stuff we're not too fond of
stories where the character doesn't want anything or woe-is-me stories where the character spends most of the time complaining, without doing anything to change it
second-person narration. It just sounds too much like meditation tapes or choose-your-own-adventure games to us. Sorry
pieces that are too experimental, like stream-of-consciousness stories or stories told from really odd points of view (like a flower or a walking stick)
The best suggestion we can give you is to read a couple of the stories on the site (or get a copy of our magazine, if you have some spare change in your pocket) to get a feel for the stories we choose. Good luck!