Someone posted a link to this story - which is funny, and anyone who's a professional in some sort of writing can probably relate. :)
I have not yet gotten to the stage of being that traditionally harsh, and I don't really mind people telling me their ideas. Once in a while, I work with other people. Sometimes this is a mistake, other times it isn't.
Regardless, I will not make your game for you. Even if it's the coolest idea ever. (And some of the ideas I get handed are at least somewhat cool.)
I will point you in the direction of tools you can use to make it yourself.
If you can get your game at least to playable demo stage, then come and talk to me again. IF I like your game and IF it's well-matched to my audience and IF there's something I think I can offer you to make your game more successful, then maybe we make a deal... but I still won't make your game for you. I just might be able to give you some advice or other help.
Not getting my help doesn't necessarily mean your game is crap, it just means that I don't think my help would be a productive use of my time. If you're writing an FPS, you seriously don't want my help. My help wouldn't do you any good.