I might also suggest adding some ideas of things you want to do, or have happen, or explore in the story. The link you provided shows some basic starting points but no plot or theme or specific interests.
Example: for the pirate concept - do you want rousing adventure? Tons'o smut? Pirate vs. lovecraftian monstrosities? Did I miss where you talk about who you want to play against? Male characters? Female ones? Don't care? Even if you want just a non-sexy fantasy adventure, folks generally like to know that and what - in general - type of characters you're looking to play with, as well as general post frequency, hoped for length and so on.