[quote=@Vilageidiotx]
<Snipped quote by Jig>

To add too this, it can actually help with the world building.

With an interest check, it is a good idea to pitch a very basic idea and try to drum up interest by allowing others to participate in that idea's germination. People feel more inclined to dedicate time to something they helped to build.
[/quote]

While I've tried this method a billion times, I tend to find that the players of an RP are frequently reluctant to contribute to world-building or plot development, and kind of expect a GM to have it all basically sorted. They might offer criticism on what the GM has, but otherwise tend to be passive.

That's just my experience, though.