are u aloud to bump??????????????????????????
Why would you need to bump when you just posted the thread? :/ Additionally, to answer your question (just to help you for future reference), you're not. The only time you're allowed to bump around these parts is if you're an author posting a new chapter in your story.
In any case, I'd highly advise against doing this. The problem is that if you try to write a story with a reader's character, unless you're
extremely good at characterization (or egotistical enough to think you are, like yours truly), you're going to run into the following problems:
1. Sometimes, readers might not be overly detailed with these kinds of profiles, so you end up stuck with only a tiny amount of information to work with -- not even enough to build an interesting character.
2. If you get the characterization wrong, not everyone would be flattered (especially if the character they sent in was a pet OC or even a self-insert). The reason why is because it'd be like what would happen if I wrote a story about you and got you
completely wrong -- as in, wrote you as a ditz with a Valley girl accent or something.
Of course, there's other problems with asking for OCs, too.
For one, you're the only one who knows what your story details are. Each character in your story needs to fit that particular world. (In other words, they need to be fairly normal for your setting and plot.) If a character is created who doesn't, it'd be a lot like trying to jam puzzle pieces from completely different jigsaw puzzles together. It just won't look right in the end. Unfortunately, because we know nothing about your story (and because certain details that would give us a better idea are the kinds of things that you should be revealing as the story progresses, not in a summary outside of it), we can't create characters that fit what you probably have in mind. As a result, you'll probably get a mishmash of characters you'll struggle to use. (For one lovely example, I once tried a submit-your-own-OC story on FFNet. The setting involved a tournament where all of the characters were completely human. I kept getting psychics and furries instead -- characters I just couldn't use.)
Another problem? You run at a risk of turning some of your audience away from your fic. After all, the cast is one of the basic elements of any story. What does it say to us if you can't come up with your own, bluntly put?
In short, I'd suggest coming up with your own cast, really. If you want to create a story where a bunch of other people come up with characters, it might be a better idea to just
turn it into an RPG.