I've gone through that situation enough times in the past where I work out a huge background, story and all that jazz and just had nothing back. I didn't want to risk wasting all that time, and the Interest Check would have to be in Advanced because I wouldn't want to GM in a different section - which, of course, reduces the pool of potential players compared to Casual.

Anyhoo, thanks for your interest. I'll keep this thread ticking over to see if there will be a sudden wave in popularity after you broke cover. :)