You seem to be confused NCN. Every person here, bar none, thinks the idea is the most important thing. Period. This school of thought was formed long ago. In fact, I think MoonHunter may have formed it originally. :-)
On top of the "idea" its sometimes nice to have some cool fluff, or prose, or funky presentation, or delicious minutae or what have you. That is why we have "Idea Seeds" and "Stubs", and "Scrolls" and "Forums" as well as "Submissions", so our "idea-makers" can choose their milieu. Other times a great idea is a great idea, and stands lovely on its own without any furbishings. Vague, succinct ideas jotted down to percolate people's imaginations are great! No one has any issues with this approach. And at the same time, (and NOT at the expense of a simple, clear, succinct idea), you can have long rambling ideas with lots of details and minutae. Those are fun too. There is no wrong approach. It is all relative.
My humble suggestion would be, dont worry about what submissions "should" be. Just jump in and enjoy them, and share a few ideas of your own as well with us!
Also, you don't need to sign your posts "NCN". We see that you are NCN by looking at your name to the left of your comment. :-) Go to Comment